Bump rack from 3.0.9.1 to 3.0.12

Bumps [rack](https://github.com/rack/rack) from 3.0.9.1 to 3.0.12.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.0.9.1...v3.0.12)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -89,7 +89,7 @@ GEM
       stringio
     public_suffix (5.0.4)
     racc (1.7.3)
-    rack (3.0.9.1)
+    rack (3.0.12)
     rake (13.1.0)
     rdf (3.3.1)
       bcp47_spec (~> 0.2)