Update actions/checkout action to v4 (#119)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -14,7 +14,7 @@ jobs:
       WORKSPACE: ${{ github.workspace }}
       GRADLE_OPTS: -Xmx1500m -Dfile.encoding=UTF-8
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
@@ -34,7 +34,7 @@ jobs:
     needs: ['build']
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:

.github/workflows/release-notes.yml

@@ -11,7 +11,7 @@ jobs:
   release_notes:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check if it has release drafter config file
         id: check_release_drafter
         run: |

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
       GIT_USER_EMAIL: [email protected]
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           token: ${{ secrets.GH_TOKEN }}
       - uses: gradle/wrapper-validation-action@v1