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

@@ -177,7 +177,7 @@ GEM
       racc (~> 1.4)
     nokogiri (1.17.2-x86_64-linux)
       racc (~> 1.4)
-    oj (3.16.7)
+    oj (3.16.8)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
     orm_adapter (0.5.0)