update deprecated gradle actions

See
755ed7db09/docs/deprecation-upgrade-guide.md

.github/workflows/build-1.20.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Validate Gradle Wrapper
-        uses: gradle/wrapper-validation-action@v3
+        uses: gradle/actions/wrapper-validation@v4
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4
@@ -25,7 +25,7 @@ jobs:
 
       - name: Build
         id: build
-        uses: gradle/gradle-build-action@v3
+        uses: gradle/actions/setup-gradle@v4
         with:
           arguments: build
         env: