Bump rack from 2.2.6.4 to 2.2.13

Bumps [rack](https://github.com/rack/rack) from 2.2.6.4 to 2.2.13.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.6.4...v2.2.13)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
     public_suffix (5.0.1)
     pygments.rb (2.3.1)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.13)
     rb-fchange (0.0.6)
       ffi
     rb-fsevent (0.11.2)