Upgrade: Bump oj from 3.16.9 to 3.17.3

Bumps [oj](https://github.com/ohler55/oj) from 3.16.9 to 3.17.3.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](ohler55/oj@v3.16.9...v3.17.3)

---
updated-dependencies:
- dependency-name: oj
  dependency-version: 3.17.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1,14 +1,14 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    bigdecimal (3.1.9)
+    bigdecimal (4.1.2)
     csv (3.3.2)
     moji (1.6)
     nkf (0.2.0)
-    oj (3.16.9)
+    oj (3.17.3)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
-    ostruct (0.6.1)
+    ostruct (0.6.3)
     rake (13.2.1)
     romaji (0.2.4)
       rake (>= 0.8.0)