Update pages.yml

Author: catgoose

.github/workflows/pages.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v2
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v4
         with:
           # Upload entire repository
           path: 'doc'