Bump eslint-plugin-import from 2.26.0 to 2.29.1 in /frontend

Bumps [eslint-plugin-import](https://github.com/import-js/eslint-plugin-import) from 2.26.0 to 2.29.1.
- [Release notes](https://github.com/import-js/eslint-plugin-import/releases)
- [Changelog](https://github.com/import-js/eslint-plugin-import/blob/main/CHANGELOG.md)
- [Commits](import-js/eslint-plugin-import@v2.26.0...v2.29.1)

---
updated-dependencies:
- dependency-name: eslint-plugin-import
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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