Bump shoulda-matchers from 6.0.0 to 6.1.0

Bumps [shoulda-matchers](https://github.com/thoughtbot/shoulda-matchers) from 6.0.0 to 6.1.0.
- [Release notes](https://github.com/thoughtbot/shoulda-matchers/releases)
- [Changelog](https://github.com/thoughtbot/shoulda-matchers/blob/main/CHANGELOG.md)
- [Commits](thoughtbot/shoulda-matchers@v6.0.0...v6.1.0)

---
updated-dependencies:
- dependency-name: shoulda-matchers
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -272,7 +272,7 @@ GEM
       sprockets-rails
       tilt
     shoulda-context (2.0.0)
-    shoulda-matchers (6.0.0)
+    shoulda-matchers (6.1.0)
       activesupport (>= 5.2.0)
     sidekiq (7.2.0)
       concurrent-ruby (< 2)