CI: Upgrade website deploy

Author: BornToBeRoot

.github/workflows/deploy_website.yml

@@ -48,7 +48,7 @@ jobs:
         run: yarn build
 
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}