chore(deps): bump rb_sys from 0.9.124 to 0.9.125

Bumps [rb_sys](https://github.com/oxidize-rb/rb-sys) from 0.9.124 to 0.9.125.
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](oxidize-rb/rb-sys@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
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -48,7 +48,8 @@ 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)
     rdoc (7.2.0)
       erb