build(deps): bump rb_sys in /bindings/ruby in the per-dependency group (#649)

Bumps the per-dependency group in /bindings/ruby with 1 update: [rb_sys](https://github.com/oxidize-rb/rb-sys).


Updates `rb_sys` from 0.9.124 to 0.9.125
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](https://github.com/oxidize-rb/rb-sys/compare/v0.9.124...v0.9.125)

---
updated-dependencies:
- dependency-name: rb_sys
  dependency-version: 0.9.125
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: per-dependency
...

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

bindings/ruby/Gemfile.lock

@@ -26,7 +26,8 @@ GEM
     rake-compiler (1.3.1)
       rake
     rake-compiler-dock (1.11.0)
-    rb_sys (0.9.124)
+    rb_sys (0.9.125)
+      json (>= 2)
       rake-compiler-dock (= 1.11.0)
     regexp_parser (2.11.3)
     rubocop (1.86.0)