Bump shoulda-matchers from 6.3.0 to 6.3.1

Bumps [shoulda-matchers](https://github.com/thoughtbot/shoulda-matchers) from 6.3.0 to 6.3.1.
- [Release notes](https://github.com/thoughtbot/shoulda-matchers/releases)
- [Changelog](https://github.com/thoughtbot/shoulda-matchers/blob/main/CHANGELOG.md)
- [Commits](thoughtbot/shoulda-matchers@v6.3.0...v6.3.1)

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

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

Gemfile.lock

@@ -172,7 +172,7 @@ GEM
     marcel (1.0.4)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.24.1)
+    minitest (5.25.0)
     mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
@@ -288,7 +288,7 @@ GEM
       sprockets-rails
       tilt
     shoulda-context (2.0.0)
-    shoulda-matchers (6.3.0)
+    shoulda-matchers (6.3.1)
       activesupport (>= 5.2.0)
     sidekiq (7.3.0)
       concurrent-ruby (< 2)