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](https://github.com/thoughtbot/shoulda-matchers/compare/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] <support@github.com>

Gemfile.lock

@@ -423,7 +423,7 @@ GEM
       rb_sys (~> 0.9)
     compare-xml (0.66)
       nokogiri (~> 1.8)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
     cookiejar (0.3.3)
     crack (0.4.5)
@@ -696,7 +696,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.5)
-    minitest (5.20.0)
+    minitest (5.21.2)
     msgpack (1.7.2)
     multi_json (1.15.0)
     mustermann (3.0.0)
@@ -986,7 +986,7 @@ GEM
       websocket (~> 1.0)
     semantic (1.6.1)
     shoulda-context (2.0.0)
-    shoulda-matchers (6.0.0)
+    shoulda-matchers (6.1.0)
       activesupport (>= 5.2.0)
     signet (0.18.0)
       addressable (~> 2.8)