Bump rack from 3.0.4.1 to 3.0.8

Bumps [rack](https://github.com/rack/rack) from 3.0.4.1 to 3.0.8.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v3.0.4.1...v3.0.8)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -56,7 +56,7 @@ GEM
       ast (~> 2.4.1)
       racc
     racc (1.7.1)
-    rack (3.0.4.1)
+    rack (3.0.8)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)