Update gradle/actions action to v4 (#77)

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

.github/workflows/gradle.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v3
       - name: Validate Gradle wrapper
-        uses: gradle/actions/wrapper-validation@v3
+        uses: gradle/actions/wrapper-validation@v4
 
   # Basic Compliance check. Checks if codeStyle is correct and if reuse
   # is applied correctly