Bump axios from 0.20.0 to 0.28.0 in /frontend

Bumps [axios](https://github.com/axios/axios) from 0.20.0 to 0.28.0.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.28.0/CHANGELOG.md)
- [Commits](axios/axios@v0.20.0...v0.28.0)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: direct:production
...

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

frontend/package.json

@@ -9,7 +9,7 @@
     "@testing-library/user-event": "^7.2.1",
     "@tinymce/tinymce-react": "^3.14.0",
     "@videojs/http-streaming": "^2.16.3",
-    "axios": "^0.20.0",
+    "axios": "^0.28.0",
     "crypto-js": "^4.2.0",
     "dotenv": "^8.6.0",
     "emoji-picker-react": "^3.6.5",