Use java 21 to build

Author: alexcheng1982

.github/workflows/maven.yml

@@ -12,16 +12,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - uses: graalvm/setup-graalvm@v1
-      with:
-        java-version: '17'
-        distribution: 'graalvm-community'
-        components: 'native-image'
-        github-token: ${{ secrets.GITHUB_TOKEN }}
-        cache: maven
-    - name: Build with Maven
-      run: mvn -B -Pnative -DskipTests package --file pom.xml
+      - uses: actions/checkout@v4
+      - uses: graalvm/setup-graalvm@v1
+        with:
+          java-version: '21'
+          distribution: 'graalvm-community'
+          components: 'native-image'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          cache: maven
+      - name: Build with Maven
+        run: mvn -B -Pnative -DskipTests package --file pom.xml
 
-    - name: Update dependency graph
-      uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
+      - name: Update dependency graph
+        uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6