Bump @reduxjs/toolkit from 1.8.3 to 1.9.6 in /kafka-ui-react-app

Bumps [@reduxjs/toolkit](https://github.com/reduxjs/redux-toolkit) from 1.8.3 to 1.9.6.
- [Release notes](https://github.com/reduxjs/redux-toolkit/releases)
- [Commits](reduxjs/redux-toolkit@1.8.3...v1.9.6)

---
updated-dependencies:
- dependency-name: "@reduxjs/toolkit"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>