Bump oj from 3.10.7 to 3.10.8 (#9523)

* Bump oj from 3.10.7 to 3.10.8

Bumps [oj](https://github.com/ohler55/oj) from 3.10.7 to 3.10.8.
- [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/v3.10.7...v3.10.8)

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

* Bump oj from 3.10.7 to 3.10.8 (Update vendor/cache)

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

Gemfile.lock

@@ -535,7 +535,7 @@ GEM
     octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    oj (3.10.7)
+    oj (3.10.8)
     omniauth (1.9.1)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)