Bump groupdate from 6.3.0 to 6.4.0

Bumps [groupdate](https://github.com/ankane/groupdate) from 6.3.0 to 6.4.0.
- [Changelog](https://github.com/ankane/groupdate/blob/master/CHANGELOG.md)
- [Commits](ankane/groupdate@v6.3.0...v6.4.0)

---
updated-dependencies:
- dependency-name: groupdate
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -124,7 +124,7 @@ GEM
     google-protobuf (3.24.2-arm64-darwin)
     google-protobuf (3.24.2-x86_64-darwin)
     google-protobuf (3.24.2-x86_64-linux)
-    groupdate (6.3.0)
+    groupdate (6.4.0)
       activesupport (>= 6.1)
     hashdiff (1.0.1)
     i18n (1.14.1)