Bump checkout back to v5

Author: maddie480-bot

.github/workflows/tas-sync-check.yml

@@ -23,7 +23,7 @@ jobs:
     name: ${{ matrix.tas.name }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3