Bump json from 2.7.2 to 2.7.4

Bumps [json](https://github.com/ruby/json) from 2.7.2 to 2.7.4.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.7.2...v2.7.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -144,7 +144,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.7.2)
+    json (2.7.4)
     jwt (2.7.1)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)