Bump oj from 3.11.8 to 3.12.1 (#16493)

Bumps [oj](https://github.com/ohler55/oj) from 3.11.8 to 3.12.1.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ohler55/oj/compare/v3.11.8...v3.12.1)

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

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

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

Gemfile

@@ -62,7 +62,7 @@ gem 'link_header', '~> 0.0'
 gem 'mime-types', '~> 3.3.1', require: 'mime/types/columnar'
 gem 'nokogiri', '~> 1.11'
 gem 'nsa', '~> 0.2'
-gem 'oj', '~> 3.11'
+gem 'oj', '~> 3.12'
 gem 'ox', '~> 2.14'
 gem 'parslet'
 gem 'parallel', '~> 1.20'