chore(deps): bump rbs from 3.8.1 to 3.9.0 in the bundler group

Bumps the bundler group with 1 update: [rbs](https://github.com/ruby/rbs).


Updates `rbs` from 3.8.1 to 3.9.0
- [Release notes](https://github.com/ruby/rbs/releases)
- [Changelog](https://github.com/ruby/rbs/blob/master/CHANGELOG.md)
- [Commits](ruby/rbs@v3.8.1...v3.9.0)

---
updated-dependencies:
- dependency-name: rbs
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: bundler
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -220,7 +220,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rbs (3.8.1)
+    rbs (3.9.0)
       logger
     rdoc (6.12.0)
       psych (>= 4.0.0)