Merge pull request #2893 from ruby/dependabot/bundler/steep/activesupport-8.1.2.1

Bump activesupport from 8.1.2 to 8.1.2.1 in /steep

Author: soutaro

steep/Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (8.1.2)
+    activesupport (8.1.2.1)
       base64
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)