fix: downgrade actions/checkout version to v5 in Windows workflow

Author: oldrev

.github/workflows/windows.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v5
     - uses: pnpm/action-setup@v4
       with:
         version: 10