Upgrade to actions/checkout v6

Author: carlosame

.github/workflows/examples.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       # Check-out the repository under $GITHUB_WORKSPACE
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup JDK 8
         uses: actions/setup-java@v5