Merge pull request #132 from ruby-syntax-tree/dependabot/bundler/rbs-3.9.4

Bump rbs from 3.9.3 to 3.9.4

Author: github-actions[bot]

Gemfile.lock

@@ -14,7 +14,7 @@ GEM
     minitest (5.25.5)
     prettier_print (1.2.1)
     rake (13.2.1)
-    rbs (3.9.3)
+    rbs (3.9.4)
       logger
     simplecov (0.22.0)
       docile (~> 1.1)