build(deps): bump browserslist from 4.12.0 to 4.19.1 in /frontend

Bumps [browserslist](https://github.com/browserslist/browserslist) from 4.12.0 to 4.19.1.
- [Release notes](https://github.com/browserslist/browserslist/releases)
- [Changelog](https://github.com/browserslist/browserslist/blob/main/CHANGELOG.md)
- [Commits](browserslist/browserslist@4.12.0...4.19.1)

---
updated-dependencies:
- dependency-name: browserslist
  dependency-type: indirect
...

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

Author: dependabot[bot]