Update the gradle wrapper validation script to fix GitHub Actions. (#281)

- `gradle/wrapper-validation-action@v2` moved to `gradle/actions/wrapper-validation@v4`

.github/workflows/publish-exp.yml

@@ -14,7 +14,7 @@ jobs:
           java-version: 21
           distribution: 'temurin'
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/actions/wrapper-validation@v4
 
       # Generate the build number based on tags to allow per branch build numbers, not something github provides by default.
       - name: Generate build number

.github/workflows/publish.yml

@@ -30,7 +30,7 @@ jobs:
           java-version: 21
           distribution: 'temurin'
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/actions/wrapper-validation@v4
       - name: Upload to Maven
         run: ./gradlew publish --stacktrace
         env:

.github/workflows/test-push.yml

@@ -15,7 +15,7 @@ jobs:
           java-version: 21
           distribution: 'temurin'
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/actions/wrapper-validation@v4
       - run: ./gradlew build check -x test --stacktrace --warning-mode fail
       - uses: Juuxel/publish-checkstyle-report@v1
         if: ${{ failure() }}
@@ -32,7 +32,7 @@ jobs:
         with:
           java-version: 21
           distribution: 'temurin'
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/actions/wrapper-validation@v4
       - run: ./gradlew build check -x test --stacktrace --warning-mode fail
 
   # This job is used to feed the test matrix of next job to allow the tests to run in parallel