build(deps-dev): bump rbs from 4.0.2 to 4.0.3 (cloudfoundry#5204)

Bumps [rbs](https://github.com/ruby/rbs) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/ruby/rbs/releases)
- [Changelog](https://github.com/ruby/rbs/blob/master/CHANGELOG.md)
- [Commits](ruby/rbs@v4.0.2...v4.0.3)

---
updated-dependencies:
- dependency-name: rbs
  dependency-version: 4.0.3
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -338,7 +338,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rbs (4.0.2)
+    rbs (4.0.3)
       logger
       prism (>= 1.6.0)
       tsort