build(deps): bump json_pure from 2.7.2 to 2.7.5 (cloudfoundry#4051)

Bumps [json_pure](https://github.com/ruby/json) from 2.7.2 to 2.7.5.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.7.2...v2.7.5)

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

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

Gemfile.lock

@@ -288,7 +288,7 @@ GEM
     json-diff (0.4.1)
     json-schema (5.0.1)
       addressable (~> 2.8)
-    json_pure (2.7.2)
+    json_pure (2.7.5)
     jwt (2.8.1)
       base64
     kramdown (2.4.0)