Bump groupdate from 6.2.0 to 6.2.1

Bumps [groupdate](https://github.com/ankane/groupdate) from 6.2.0 to 6.2.1.
- [Release notes](https://github.com/ankane/groupdate/releases)
- [Changelog](https://github.com/ankane/groupdate/blob/master/CHANGELOG.md)
- [Commits](ankane/groupdate@v6.2.0...v6.2.1)

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

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

Gemfile.lock

@@ -214,7 +214,7 @@ GEM
     geocoder (1.8.1)
     globalid (1.1.0)
       activesupport (>= 5.0)
-    groupdate (6.2.0)
+    groupdate (6.2.1)
       activesupport (>= 5.2)
     guard (2.18.0)
       formatador (>= 0.2.4)