Bump actions/checkout from 4 to 5 (#502)

Author: dependabot[bot]

.github/workflows/check-copilot-template.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Dynamic template version check
         id: version-check