Bump webpack-dev-server from 4.11.1 to 5.0.4 in /ui/react-app

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 4.11.1 to 5.0.4.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-server/compare/v4.11.1...v5.0.4)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

ui/react-app/package.json

@@ -45,7 +45,7 @@
     "webpack": "^5.92.1",
     "webpack-bundle-analyzer": "^4.7.0",
     "webpack-cli": "^4.10.0",
-    "webpack-dev-server": "^4.11.1",
+    "webpack-dev-server": "^5.0.4",
     "webpack-merge": "^5.10.0"
   }
 }