Bump actions/checkout from 2 to 4 (#37)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/deploy.yml

@@ -25,7 +25,7 @@ jobs:
             os: ubuntu-latest
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Validate Gradle Wrapper
       uses: gradle/wrapper-validation-action@v3
     - uses: actions/cache@v4

.github/workflows/docs.yml

@@ -16,7 +16,7 @@ jobs:
       discussions: write
       repository-projects: write
     steps:
-      -  uses: actions/checkout@v2
+      -  uses: actions/checkout@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:

.github/workflows/gradle.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Validate Gradle Wrapper
       uses: gradle/wrapper-validation-action@v3
     - uses: actions/cache@v4

.github/workflows/verify.yml

@@ -19,7 +19,7 @@ jobs:
       discussions: write
       repository-projects: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 1
       - name: ktlint
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event.pull_request.draft == false
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v3
       - uses: actions/setup-java@v4