Build(deps): Bump multi_json from 1.14.1 to 1.15.0 (#10215)

Bumps [multi_json](https://github.com/intridea/multi_json) from 1.14.1 to 1.15.0.
- [Release notes](https://github.com/intridea/multi_json/releases)
- [Changelog](https://github.com/intridea/multi_json/blob/master/CHANGELOG.md)
- [Commits](https://github.com/intridea/multi_json/commits)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -199,7 +199,7 @@ GEM
     mocha (1.11.2)
     mock_redis (0.25.0)
     msgpack (1.3.3)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     mustache (1.1.1)