add _site

Author: QiLi111

.github/workflows/pages.yml

@@ -47,7 +47,10 @@ jobs:
           JEKYLL_ENV: production
       - name: Upload artifact
         # Automatically uploads an artifact from the './_site' directory by default
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v3
+        with:
+          name: github-pages
+          path: ./_site
 
   # Deployment job
   deploy: