Build(deps): Bump stringio from 3.1.1 to 3.1.2 (#29644)

Bumps [stringio](https://github.com/ruby/stringio) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/ruby/stringio/releases)
- [Changelog](https://github.com/ruby/stringio/blob/master/NEWS.md)
- [Commits](https://github.com/ruby/stringio/compare/v3.1.1...v3.1.2)

---
updated-dependencies:
- dependency-name: stringio
  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>

Gemfile.lock

@@ -548,7 +548,7 @@ GEM
     sqlite3 (2.2.0-x86_64-linux-gnu)
     sshkey (3.0.0)
     stackprof (0.2.26)
-    stringio (3.1.1)
+    stringio (3.1.2)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     syntax_tree-disable_ternary (1.0.0)