Maintenance: Bump rack-attack from 6.6.0 to 6.6.1

Bumps [rack-attack](https://github.com/rack/rack-attack) from 6.6.0 to 6.6.1.
- [Release notes](https://github.com/rack/rack-attack/releases)
- [Changelog](https://github.com/rack/rack-attack/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rack/rack-attack/compare/v6.6.0...v6.6.1)

Gemfile.lock

@@ -404,7 +404,7 @@ GEM
       rspec-rails (>= 3.0.0)
     racc (1.6.0)
     rack (2.2.3)
-    rack-attack (6.6.0)
+    rack-attack (6.6.1)
       rack (>= 1.0, < 3)
     rack-livereload (0.3.17)
       rack