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
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -9,7 +9,7 @@ gem 'rexml', '~> 3.2'
 gem 'puma', '~> 5.5'
 gem 'rails', '~> 6.1.4'
 gem 'sprockets', '~> 3.7.2'
-gem 'thor', '~> 1.1'
+gem 'thor', '~> 1.2'
 gem 'rack', '~> 2.2.3'
 
 gem 'hamlit-rails', '~> 0.2'