Bump thor from 1.1.0 to 1.2.1 (#17250)

Bumps [thor](https://github.com/rails/thor) from 1.1.0 to 1.2.1.
- [Release notes](https://github.com/rails/thor/releases)
- [Commits](https://github.com/rails/thor/compare/v1.1.0...v1.2.1

)

---
updated-dependencies:
- dependency-name: thor
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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