Update gradle/actions action to v6 (#28)

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

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -31,7 +31,7 @@ jobs:
     # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.
     # See: https://github.com/gradle/actions/blob/main/setup-gradle/README.md
     - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5.0.2
+      uses: gradle/actions/setup-gradle@0f4528296b4bc09e8ae0fc7be30185a4ab435545 # v6.0.0
 
     - name: Build with Gradle Wrapper
       run: ./gradlew build
@@ -64,4 +64,4 @@ jobs:
     # Generates and submits a dependency graph, enabling Dependabot Alerts for all project dependencies.
     # See: https://github.com/gradle/actions/blob/main/dependency-submission/README.md
     - name: Generate and submit dependency graph
-      uses: gradle/actions/dependency-submission@0723195856401067f7a2779048b490ace7a47d7c # v5.0.2
+      uses: gradle/actions/dependency-submission@0f4528296b4bc09e8ae0fc7be30185a4ab435545 # v6.0.0

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Build JAR with Gradle
         run: ./gradlew build