fix: check out site before Pages deployment

Author: SwiftSIQI

.github/workflows/deploy-pages.yml

@@ -21,6 +21,8 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
+      - name: Check out source
+        uses: actions/checkout@v4
       - name: Configure Pages
         uses: actions/configure-pages@v5
       - name: Upload site