Bump @oclif/plugin-warn-if-update-available from 2.0.27 to 2.0.28

Bumps [@oclif/plugin-warn-if-update-available](https://github.com/oclif/plugin-warn-if-update-available) from 2.0.27 to 2.0.28.
- [Release notes](https://github.com/oclif/plugin-warn-if-update-available/releases)
- [Changelog](https://github.com/oclif/plugin-warn-if-update-available/blob/main/CHANGELOG.md)
- [Commits](oclif/plugin-warn-if-update-available@2.0.27...2.0.28)

---
updated-dependencies:
- dependency-name: "@oclif/plugin-warn-if-update-available"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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