Sync with upstream v279

CHANGELOG.md

@@ -3,6 +3,10 @@
 ## [Unreleased]
 
 
+## [v279] - 2024-09-04
+
+- Ruby 3.3.5 is now available (https://github.com/heroku/heroku-buildpack-ruby/pull/1491)
+
 ## [v278] - 2024-08-05
 
 - Ruby 3.2.5 is now available (https://github.com/heroku/heroku-buildpack-ruby/pull/1488)
@@ -1562,7 +1566,8 @@ Bugfixes:
 * Change gem detection to use lockfile parser
 * use `$RACK_ENV` when thin is detected for rack apps
 
-[unreleased]: https://github.com/heroku/heroku-buildpack-ruby/compare/v278...main
+[unreleased]: https://github.com/heroku/heroku-buildpack-ruby/compare/v279...main
+[v279]: https://github.com/heroku/heroku-buildpack-ruby/compare/v278...v279
 [v278]: https://github.com/heroku/heroku-buildpack-ruby/compare/v277...v278
 [v277]: https://github.com/heroku/heroku-buildpack-ruby/compare/v276...v277
 [v276]: https://github.com/heroku/heroku-buildpack-ruby/compare/v275...v276

changelogs/v279/ruby-3.3.5.md

@@ -0,0 +1,10 @@
+## Ruby version 3.3.5 is now available
+
+[Ruby v3.3.5](/articles/ruby-support#ruby-versions) is now available on Heroku. To run
+your app using this version of Ruby, add the following `ruby` directive to your Gemfile:
+
+```ruby
+ruby "3.3.5"
+```
+
+For more information on [Ruby 3.3.5, you can view the release announcement](https://www.ruby-lang.org/en/news/).

lib/language_pack/version.rb

@@ -2,6 +2,6 @@
 
 module LanguagePack
   class LanguagePack::Base
-    BUILDPACK_VERSION = "v278"
+    BUILDPACK_VERSION = "v279"
   end
 end