chore(deps): update peaceiris/actions-gh-pages action to v4

Author: renovate[bot]

.github/workflows/gh-pages.yml

@@ -40,7 +40,7 @@ jobs:
 
       - name: Deploy to GitHub Pages
         if: github.ref == 'refs/heads/main'
-        uses: peaceiris/actions-gh-pages@v3.0.0
+        uses: peaceiris/actions-gh-pages@v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./site