Update actions/checkout action to v5

.gitea/workflows/workflow.yaml

@@ -77,7 +77,7 @@ jobs:
       (github.event_name == 'pull_request' && github.event.action != 'closed' && github.event.pull_request.merged == false)
       || github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Sync files via scp
         uses: appleboy/scp-action@master