fix pdm dependencies action actions/checkout version

Author: sigma67

.github/workflows/pdm.yml

@@ -8,7 +8,7 @@ jobs:
   update-dependencies:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
 
       - name: Update dependencies
         uses: pdm-project/update-deps-action@main