update GitHub actions: setup-java to v4, wrapper-validation-action to v2 (jMonkeyEngine#2192)

Resolves the deprecation of Node.js 16

Author: stephengold

.github/workflows/main.yml

@@ -69,7 +69,7 @@ jobs:
         with:
           fetch-depth: 1
       - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v2
       - name: Build
         run: |
           ./gradlew -PuseCommitHashAsVersionName=true --no-daemon -PbuildNativeProjects=true \
@@ -113,7 +113,7 @@ jobs:
           fetch-depth: 1
 
       - name: Setup the java environment
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.jdk }}
@@ -125,7 +125,7 @@ jobs:
           path: build/native
 
       - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v2
       - name: Build Engine
         shell: bash
         run: |
@@ -307,7 +307,7 @@ jobs:
 
       # Setup jdk 17 used for building Maven-style artifacts
       - name: Setup the java environment
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '17'
@@ -351,7 +351,7 @@ jobs:
 
       # Setup jdk 17 used for building Sonatype OSSRH artifacts
       - name: Setup the java environment
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '17'