Update heroku/buildpacks-jvm to v6.0.0 (#527)

## heroku/gradle

### Changed

- Some error messages have changed so they longer suggest to open a Heroku support ticket. Instead, users are now provided with a link to create an issue on GitHub. ([#674](heroku/buildpacks-jvm#674))

## heroku/java

### Changed

- Updated `heroku/gradle` to `6.0.0`.
- Updated `heroku/jvm` to `6.0.0`.
- Updated `heroku/maven` to `6.0.0`.

## heroku/java-function

### Changed

- Updated `heroku/jvm-function-invoker` to `6.0.0`.
- Updated `heroku/jvm` to `6.0.0`.
- Updated `heroku/maven` to `6.0.0`.

## heroku/jvm

### Added

- Checksum validation of downloaded OpenJDK distribution files. ([#680](heroku/buildpacks-jvm#680))
- A warning will now be shown when the OpenJDK version is not explicitly configured for an application. ([#681](heroku/buildpacks-jvm#681))

### Changed

- This buildpack now installs the latest long-term support release (currently 21) of OpenJDK if no version is explicitly configured. Previously, OpenJDK 8 was installed as the default. ([#681](heroku/buildpacks-jvm#681))
- Some error messages have changed so they longer suggest to open a Heroku support ticket. Instead, users are now provided with a link to create an issue on GitHub. ([#674](heroku/buildpacks-jvm#674))

### Removed

- The buildpack no longer installs [Heroku's Java Metrics Agent](https://github.com/heroku/heroku-java-metrics-agent). It is only useful on the Heroku platform and can be installed by a dedicated buildpack in the future. ([#679](heroku/buildpacks-jvm#679))

## heroku/jvm-function-invoker

- No changes.

## heroku/maven

### Changed

- Some error messages have changed so they longer suggest to open a Heroku support ticket. Instead, users are now provided with a link to create an issue on GitHub. ([#674](heroku/buildpacks-jvm#674))

## heroku/sbt

### Changed

- Some error messages have changed so they longer suggest to open a Heroku support ticket. Instead, users are now provided with a link to create an issue on GitHub. ([#674](heroku/buildpacks-jvm#674))

## heroku/scala

### Changed

- Updated `heroku/jvm` to `6.0.0`.
- Updated `heroku/sbt` to `6.0.0`.

Co-authored-by: heroku-linguist[bot] <136119646+heroku-linguist[bot]@users.noreply.github.com>

builder-20/builder.toml

@@ -14,7 +14,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/java"
-  uri = "docker://docker.io/heroku/buildpack-java@sha256:3d6d435751e067b44c3ec204def2476e1cc421b893d742f4d815b1bc2e336199"
+  uri = "docker://docker.io/heroku/buildpack-java@sha256:7c5e64be14b9118831b37f9321f3a04d386a3df92d486ccb7477c8a663490f4d"
 
 [[buildpacks]]
   id = "heroku/nodejs"
@@ -38,7 +38,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/scala"
-  uri = "docker://docker.io/heroku/buildpack-scala@sha256:810191b26575119e51476fd560ef9bda637e2229830ecfac9360e7d955e617fc"
+  uri = "docker://docker.io/heroku/buildpack-scala@sha256:0c50dda170abd417da3aadde8dd7be5f1e724f6b87137a730e946d814c6b9e92"
 
 [[order]]
   [[order.group]]
@@ -60,7 +60,7 @@ version = "0.19.6"
     optional = true
   [[order.group]]
     id = "heroku/jvm"
-    version = "5.0.1"
+    version = "6.0.0"
     optional = true
   [[order.group]]
     id = "heroku/ruby"
@@ -82,7 +82,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/java"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"
@@ -91,7 +91,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/scala"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"

builder-22/builder.toml

@@ -14,7 +14,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/java"
-  uri = "docker://docker.io/heroku/buildpack-java@sha256:3d6d435751e067b44c3ec204def2476e1cc421b893d742f4d815b1bc2e336199"
+  uri = "docker://docker.io/heroku/buildpack-java@sha256:7c5e64be14b9118831b37f9321f3a04d386a3df92d486ccb7477c8a663490f4d"
 
 [[buildpacks]]
   id = "heroku/nodejs"
@@ -38,7 +38,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/scala"
-  uri = "docker://docker.io/heroku/buildpack-scala@sha256:810191b26575119e51476fd560ef9bda637e2229830ecfac9360e7d955e617fc"
+  uri = "docker://docker.io/heroku/buildpack-scala@sha256:0c50dda170abd417da3aadde8dd7be5f1e724f6b87137a730e946d814c6b9e92"
 
 [[order]]
   [[order.group]]
@@ -60,7 +60,7 @@ version = "0.19.6"
     optional = true
   [[order.group]]
     id = "heroku/jvm"
-    version = "5.0.1"
+    version = "6.0.0"
     optional = true
   [[order.group]]
     id = "heroku/ruby"
@@ -82,7 +82,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/java"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"
@@ -91,7 +91,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/scala"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"

builder-24/builder.toml

@@ -14,7 +14,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/java"
-  uri = "docker://docker.io/heroku/buildpack-java@sha256:3d6d435751e067b44c3ec204def2476e1cc421b893d742f4d815b1bc2e336199"
+  uri = "docker://docker.io/heroku/buildpack-java@sha256:7c5e64be14b9118831b37f9321f3a04d386a3df92d486ccb7477c8a663490f4d"
 
 [[buildpacks]]
   id = "heroku/nodejs"
@@ -34,7 +34,7 @@ version = "0.19.6"
 
 [[buildpacks]]
   id = "heroku/scala"
-  uri = "docker://docker.io/heroku/buildpack-scala@sha256:810191b26575119e51476fd560ef9bda637e2229830ecfac9360e7d955e617fc"
+  uri = "docker://docker.io/heroku/buildpack-scala@sha256:0c50dda170abd417da3aadde8dd7be5f1e724f6b87137a730e946d814c6b9e92"
 
 [[order]]
   [[order.group]]
@@ -56,7 +56,7 @@ version = "0.19.6"
     optional = true
   [[order.group]]
     id = "heroku/jvm"
-    version = "5.0.1"
+    version = "6.0.0"
     optional = true
   [[order.group]]
     id = "heroku/ruby"
@@ -78,7 +78,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/java"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"
@@ -87,7 +87,7 @@ version = "0.19.6"
 [[order]]
   [[order.group]]
     id = "heroku/scala"
-    version = "5.0.1"
+    version = "6.0.0"
   [[order.group]]
     id = "heroku/procfile"
     version = "3.1.1"

salesforce-functions/builder.toml

@@ -14,7 +14,7 @@ version = "0.17.6"
 
 [[buildpacks]]
   id = "heroku/java-function"
-  uri = "docker://docker.io/heroku/buildpack-java-function@sha256:18a1acbb1d9a4a63ff7c7e786266de3239cd2faa655e0fa9d8c0bb04f9380da4"
+  uri = "docker://docker.io/heroku/buildpack-java-function@sha256:769aea054da53e6edcdb40787e056609a2f5eb70ffc1bd8abffaa7c0ca3c68af"
 
 [[buildpacks]]
   id = "heroku/nodejs-function"
@@ -28,4 +28,4 @@ version = "0.17.6"
 [[order]]
   [[order.group]]
     id = "heroku/java-function"
-    version = "5.0.1"
+    version = "6.0.0"