Fix action version: revert to upload-pages-artifact@v3 (v4 doesn't exist)

Author: huaicheng

.github/workflows/deploy.yml

@@ -56,7 +56,7 @@ jobs:
             --baseURL "${{ steps.pages.outputs.base_url }}/"
             
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v3
         with:
           path: ./public