chore(deps): bump stringio from 3.1.1 to 3.1.2

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](ruby/stringio@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>

Gemfile.lock

@@ -303,7 +303,7 @@ GEM
     smart_properties (1.17.0)
     sqlite3 (2.2.0)
       mini_portile2 (~> 2.8.0)
-    stringio (3.1.1)
+    stringio (3.1.2)
     thor (1.3.2)
     timeout (0.4.2)
     turbo-rails (2.0.11)