add java 21 in CI

Author: tanya732

.github/workflows/build-and-test.yml

@@ -9,12 +9,17 @@ on:
 jobs:
   gradle:
     runs-on:  ubuntu-latest
+
+    strategy:
+      matrix:
+        java-version: [11, 17, 21]
+
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v3
         with:
           distribution: temurin
-          java-version: 11
+          java-version: ${{ matrix.java-version }}
       - uses: gradle/gradle-build-action@a4cf152f482c7ca97ef56ead29bf08bcd953284c
         with:
           arguments: assemble apiDiff check jacocoTestReport --continue --console=plain