Bump rspec-openapi from 0.21.0 to 0.21.1

Bumps [rspec-openapi](https://github.com/exoego/rspec-openapi) from 0.21.0 to 0.21.1.
- [Release notes](https://github.com/exoego/rspec-openapi/releases)
- [Changelog](https://github.com/exoego/rspec-openapi/blob/master/CHANGELOG.md)
- [Commits](exoego/rspec-openapi@v0.21.0...v0.21.1)

---
updated-dependencies:
- dependency-name: rspec-openapi
  dependency-version: 0.21.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -167,7 +167,7 @@ GEM
       sexp_processor
     coderay (1.1.3)
     concurrent-ruby (1.3.5)
-    connection_pool (2.5.4)
+    connection_pool (2.5.5)
     crack (1.0.1)
       bigdecimal
       rexml
@@ -525,7 +525,7 @@ GEM
     rspec-mocks (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-openapi (0.21.0)
+    rspec-openapi (0.21.1)
       actionpack (>= 5.2.0)
       rails-dom-testing
       rspec-core