Bump rswag-ui from 2.11.0 to 2.12.0

Bumps [rswag-ui](https://github.com/rswag/rswag) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/rswag/rswag/releases)
- [Changelog](https://github.com/rswag/rswag/blob/master/CHANGELOG.md)
- [Commits](rswag/rswag@2.11.0...2.12.0)

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

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

Gemfile.lock

@@ -266,7 +266,7 @@ GEM
     rexml (3.2.6)
     rswag-api (2.11.0)
       railties (>= 3.1, < 7.2)
-    rswag-ui (2.11.0)
+    rswag-ui (2.12.0)
       actionpack (>= 3.1, < 7.2)
       railties (>= 3.1, < 7.2)
     ruby2_keywords (0.0.5)