Bump gradle/actions from 3 to 4 in the gha group (#474)

Bumps the gha group with 1 update: [gradle/actions](https://github.com/gradle/actions).
Remove now redundant action, the wrapper validation is now done by default by setup-gradle.

Updates `gradle/actions` from 3 to 4
- [Release notes](https://github.com/gradle/actions/releases)
- [Commits](gradle/actions@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -19,7 +19,6 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
-      - uses: gradle/actions/wrapper-validation@v3
-      - uses: gradle/actions/setup-gradle@v3
+      - uses: gradle/actions/setup-gradle@v4
       - run: ./gradlew assemble
       - run: ./gradlew check