Bump gradle/actions from 4.0.0 to 6.1.0

Bumps [gradle/actions](https://github.com/gradle/actions) from 4.0.0 to 6.1.0.
- [Release notes](https://github.com/gradle/actions/releases)
- [Commits](gradle/actions@af1da67...50e97c2)

---
updated-dependencies:
- dependency-name: gradle/actions
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/gradle-publish.yml

@@ -30,7 +30,7 @@ jobs:
         settings-path: ${{ github.workspace }} # location for the settings.xml file
 
     - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582 # v4.0.0
+      uses: gradle/actions/setup-gradle@50e97c2cd7a37755bbfafc9c5b7cafaece252f6e # v6.1.0
 
     - name: Build with Gradle
       run: ./gradlew build