Bump gradle/gradle-build-action in /.github/workflows

Bumps [gradle/gradle-build-action](https://github.com/gradle/gradle-build-action) from 2.3.3 to 2.4.2.
- [Release notes](https://github.com/gradle/gradle-build-action/releases)
- [Commits](gradle/gradle-build-action@v2.3.3...v2.4.2)

---
updated-dependencies:
- dependency-name: gradle/gradle-build-action
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         password: ${{ secrets.CLOUDSMITH_APIKEY }}
     - name: Publish docker image
       if: ${{ startsWith(github.ref, 'refs/heads/master') }}
-      uses: gradle/gradle-build-action@v2.3.3
+      uses: gradle/gradle-build-action@v2.4.2
       env:
         BRANCH_NAME: ${{ github.ref_name }}
       with: