Bump shoulda-matchers from 5.1.0 to 6.4.0 (#972)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -356,7 +356,7 @@ GEM
     mime-types-data (3.2024.0305)
     mini_magick (4.13.2)
     mini_mime (1.1.5)
-    minitest (5.24.1)
+    minitest (5.25.1)
     multi_json (1.15.0)
     multipart-post (2.1.1)
     mutex_m (0.2.0)
@@ -751,7 +751,7 @@ GEM
     sentry-ruby (5.9.0)
       concurrent-ruby (~> 1.0, >= 1.0.2)
     sexp_processor (4.16.1)
-    shoulda-matchers (5.1.0)
+    shoulda-matchers (6.4.0)
       activesupport (>= 5.2.0)
     simplecov (0.22.0)
       docile (~> 1.1)