Update GitHub actions to run on Node 20 (#804)

Update setup-java and cache actions from v3 to v4 to run on Node 20.
Update wrapper-validation-action from v1 to v2 to run on Node 20

Fixes CI warnings:

> Node.js 16 actions are deprecated.
> Please update the following actions to use Node.js 20:
> actions/wrapper-validation-action@v1, actions/setup-java@v3, actions/cache@v3.
> For more information see:
> https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

PR: #804

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v4
       - name: Validate Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v2
 
   # Our basic build step as we want contributors to have a nice developer
   # experience with little build time and sufficient feedback. Therefore, we
@@ -59,7 +59,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 11
           distribution: temurin
@@ -82,13 +82,13 @@ jobs:
           # Sonar needs the whole Git history for issue assignment
           fetch-depth: 0
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: temurin
           cache: 'gradle'
       - name: Cache SonarCloud results
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.sonar/cache/
           key: ubuntu-sonar
@@ -112,7 +112,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 11
           distribution: temurin
@@ -141,7 +141,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
           distribution: temurin
@@ -179,7 +179,7 @@ jobs:
         shell: bash
         run: echo "JDK_EXPERIMENTAL=$JAVA_HOME" >> $GITHUB_ENV
       - name: Set up supported Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: temurin
@@ -210,7 +210,7 @@ jobs:
           # Shipkit needs the whole Git history for changelog generation
           fetch-depth: 0
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           # we build the Javadoc with JDK 17 (for better results),
           # so install that as well