Update run-sample-app.yml

Author: wenbinf

.github/workflows/run-sample-app.yml

@@ -8,10 +8,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v2
         with:
-          java-version: '11'
+          java-version: '21'
           distribution: 'adopt'
       - name: Run Sample App
         run: ./gradlew run