Bump rswag-api from 2.7.0 to 2.8.0

Bumps [rswag-api](https://github.com/rswag/rswag) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/rswag/rswag/releases)
- [Changelog](https://github.com/rswag/rswag/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rswag/rswag/compare/2.7.0...2.8.0)

---
updated-dependencies:
- dependency-name: rswag-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -589,7 +589,7 @@ GEM
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
     rspec-support (3.10.3)
-    rswag-api (2.7.0)
+    rswag-api (2.8.0)
       railties (>= 3.1, < 7.1)
     rswag-specs (2.8.0)
       activesupport (>= 3.1, < 7.1)