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

Author: renovate[bot]

.github/workflows/flutter.yml

@@ -32,7 +32,7 @@ jobs:
         run: flutter build web --release --base-href="/profile/"
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3.9.3
+        uses: peaceiris/actions-gh-pages@v4.0.0
         with:
            github_token: ${{ secrets.GITHUB_TOKEN }}
            publish_dir: ./build/web