Bump i18n from 1.9.0 to 1.9.1 (#21369)

Bumps [i18n](https://github.com/ruby-i18n/i18n) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/ruby-i18n/i18n/releases)
- [Changelog](https://github.com/ruby-i18n/i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ruby-i18n/i18n/compare/v1.9.0...v1.9.1)

---
updated-dependencies:
- dependency-name: i18n
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

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

Gemfile.lock

@@ -29,7 +29,7 @@ GEM
     ffi (1.15.5-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.8.0)
-    i18n (1.9.0)
+    i18n (1.9.1)
       concurrent-ruby (~> 1.0)
     jekyll (4.2.1)
       addressable (~> 2.4)