Bump shoulda-matchers from 6.3.1 to 6.4.0

Bumps [shoulda-matchers](https://github.com/thoughtbot/shoulda-matchers) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/thoughtbot/shoulda-matchers/releases)
- [Changelog](https://github.com/thoughtbot/shoulda-matchers/blob/main/CHANGELOG.md)
- [Commits](thoughtbot/shoulda-matchers@v6.3.1...v6.4.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -315,7 +315,7 @@ GEM
     mime-types-data (3.2024.0702)
     mini_magick (4.13.2)
     mini_mime (1.1.5)
-    minitest (5.25.0)
+    minitest (5.25.1)
     mobility (1.2.9)
       i18n (>= 0.6.10, < 2)
       request_store (~> 1.0)
@@ -524,7 +524,7 @@ GEM
       concurrent-ruby (~> 1.0, >= 1.0.2)
     shoulda-callback-matchers (1.1.4)
       activesupport (>= 3)
-    shoulda-matchers (6.3.1)
+    shoulda-matchers (6.4.0)
       activesupport (>= 5.2.0)
     sidekiq (7.3.0)
       concurrent-ruby (< 2)