build(deps-dev): bump rbs_rails from 0.12.0 to 0.12.1

Bumps [rbs_rails](https://github.com/pocke/rbs_rails) from 0.12.0 to 0.12.1.
- [Changelog](https://github.com/pocke/rbs_rails/blob/master/CHANGELOG.md)
- [Commits](pocke/rbs_rails@v0.12.0...v0.12.1)

---
updated-dependencies:
- dependency-name: rbs_rails
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -359,7 +359,7 @@ GEM
     rbs-inline (0.10.0)
       prism (>= 0.29, < 1.3)
       rbs (>= 3.5.0)
-    rbs_rails (0.12.0)
+    rbs_rails (0.12.1)
       parser
       rbs (>= 1)
     rdoc (6.7.0)