build(deps): bump rack-attack from 6.7.0 to 6.8.0

Bumps [rack-attack](https://github.com/rack/rack-attack) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/rack/rack-attack/releases)
- [Changelog](https://github.com/rack/rack-attack/blob/main/CHANGELOG.md)
- [Commits](rack/rack-attack@v6.7.0...v6.8.0)

---
updated-dependencies:
- dependency-name: rack-attack
  dependency-version: 6.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -433,8 +433,8 @@ GEM
     pundit (2.5.2)
       activesupport (>= 3.0.0)
     racc (1.8.1)
-    rack (3.1.18)
-    rack-attack (6.7.0)
+    rack (3.1.19)
+    rack-attack (6.8.0)
       rack (>= 1.0, < 4)
     rack-cors (3.0.0)
       logger