Upgrade to setup-gradle@v4

Also removed  the gradle wrapper validation as that's performed by setup-gradle (the previous gradle build action didn't validate the wrapper)

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
           distribution: 'adopt'
 
       - name: Setup Gradle
-        uses: gradle/gradle-build-action@v3
+        uses: gradle/actions/setup-gradle@v4
 
       - name: Build & run tests
         run: ./gradlew build --no-daemon

.github/workflows/code-generators.yml

@@ -9,17 +9,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Gradle wrapper validation
-        uses: gradle/actions/wrapper-validation@v4
-
       - name: Setup JDK 21
         uses: actions/setup-java@v4
         with:
           java-version: 21
           distribution: 'adopt'
 
       - name: Setup Gradle
-        uses: gradle/gradle-build-action@v3
+        uses: gradle/actions/setup-gradle@v4
 
       - name: Generate code
         run: ./gradlew generateCode --no-daemon

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
           java-version: '11'
           cache: 'gradle'
       - name: Setup gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@v4
         with:
           gradle-home-cache-cleanup: true
       - name: Publish the artifacts