chore(deps): bump browserslist in /packages/postcss-config

Bumps [browserslist](https://github.com/browserslist/browserslist) from 4.16.4 to 4.22.3.
- [Changelog](https://github.com/browserslist/browserslist/blob/main/CHANGELOG.md)
- [Commits](browserslist/browserslist@4.16.4...4.22.3)

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

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