Bump oj from 3.16.7 to 3.16.8

Bumps [oj](https://github.com/ohler55/oj) from 3.16.7 to 3.16.8.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](ohler55/oj@v3.16.7...v3.16.8)

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

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

Gemfile.lock

@@ -435,7 +435,7 @@ GEM
       racc (~> 1.4)
     notifications-ruby-client (6.2.0)
       jwt (>= 1.5, < 3)
-    oj (3.16.7)
+    oj (3.16.8)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
     omniauth (2.1.2)
@@ -463,7 +463,7 @@ GEM
       webfinger (~> 2.0)
     optimist (3.2.0)
     os (1.1.4)
-    ostruct (0.6.0)
+    ostruct (0.6.1)
     pagy (9.3.3)
     parallel (1.26.3)
     parallel_tests (4.7.2)