Update run-sample-app.yml

Author: wenbinf

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

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up JDK 11
         uses: actions/setup-java@v2
         with: