Bump oj from 3.11.1 to 3.11.2 (mastodon#15657)

Bumps [oj](https://github.com/ohler55/oj) from 3.11.1 to 3.11.2.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](ohler55/oj@v3.11.1...v3.11.2)

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

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

Gemfile.lock

@@ -372,7 +372,7 @@ GEM
  concurrent-ruby (~> 1.0, >= 1.0.2)
  sidekiq (>= 3.5)
  statsd-ruby (~> 1.4, >= 1.4.0)
- oj (3.11.1)
+ oj (3.11.2)
  omniauth (1.9.1)
  hashie (>= 3.4.6)
  rack (>= 1.6.2, < 3)