chore: enable credential persistence in PR preview workflow

Author: jaworek

.github/workflows/pr-preview.yml

@@ -19,6 +19,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          persist-credentials: true
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4