Update webmock requirement from ~> 3.8.3 to ~> 3.23.0

Updates the requirements on [webmock](https://github.com/bblimke/webmock) to permit the latest version.
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](bblimke/webmock@v3.8.3...v3.23.0)

---
updated-dependencies:
- dependency-name: webmock
  dependency-type: direct:development
...

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

Author: dependabot[bot]

rspec_api_documentation.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rake", "~> 10.5.0"
   s.add_development_dependency "rack-test", "~> 0.6.3"
   s.add_development_dependency "rack-oauth2", "~> 1.12.0"
-  s.add_development_dependency "webmock", "~> 3.8.3"
+  s.add_development_dependency "webmock", "~> 3.23.0"
   s.add_development_dependency "rspec-its", "~> 1.3.0"
   s.add_development_dependency "faraday", "~> 0.9.2"
   s.add_development_dependency "nokogiri", "~> 1.8.4"