Update commonmarker requirement from ~> 0.23.0 to ~> 1.0.0

Updates the requirements on [commonmarker](https://github.com/gjtorikian/commonmarker) to permit the latest version.
- [Release notes](https://github.com/gjtorikian/commonmarker/releases)
- [Changelog](https://github.com/gjtorikian/commonmarker/blob/main/CHANGELOG.md)
- [Commits](gjtorikian/commonmarker@v0.23.0...v1.0.0)

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

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

Gemfile

@@ -13,6 +13,6 @@ group :development do
   end
   group :documentation do
     gem 'yard', '~> 0.9.0', require: false
-    gem 'commonmarker', '~> 0.23.0', require: false
+    gem 'commonmarker', '~> 1.0.0', require: false
   end
 end