Bump rack-attack from 6.5.0 to 6.6.0 (#17405)

* Bump rack-attack from 6.5.0 to 6.6.0

Bumps [rack-attack](https://github.com/rack/rack-attack) from 6.5.0 to 6.6.0.
- [Release notes](https://github.com/rack/rack-attack/releases)
- [Changelog](https://github.com/rack/rack-attack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rack/rack-attack/compare/v6.5.0...v6.6.0)

---
updated-dependencies:
- dependency-name: rack-attack
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix usage of deprecated API

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

Gemfile.lock

@@ -466,7 +466,7 @@ GEM
     raabro (1.4.0)
     racc (1.6.0)
     rack (2.2.3)
-    rack-attack (6.5.0)
+    rack-attack (6.6.0)
       rack (>= 1.0, < 3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
@@ -800,7 +800,7 @@ DEPENDENCIES
   puma (~> 5.6)
   pundit (~> 2.2)
   rack (~> 2.2.3)
-  rack-attack (~> 6.5)
+  rack-attack (~> 6.6)
   rack-cors (~> 1.1)
   rails (~> 6.1.4)
   rails-controller-testing (~> 1.0)