Bump commonmarker from 0.23.5 to 0.23.6 in /.github/workflows

Bumps [commonmarker](https://github.com/gjtorikian/commonmarker) from 0.23.5 to 0.23.6.
- [Release notes](https://github.com/gjtorikian/commonmarker/releases)
- [Changelog](https://github.com/gjtorikian/commonmarker/blob/main/CHANGELOG.md)
- [Commits](gjtorikian/commonmarker@v0.23.5...v0.23.6)

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

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

Author: dependabot[bot]

.github/workflows/Gemfile.lock

@@ -14,7 +14,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.23.5)
+    commonmarker (0.23.6)
     concurrent-ruby (1.1.10)
     dnsruby (1.61.9)
       simpleidn (~> 0.1)
@@ -213,6 +213,8 @@ GEM
     minitest (5.16.2)
     nokogiri (1.13.8-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.13.8-x86_64-linux)
+      racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
@@ -254,6 +256,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   commonmarker (~> 0.23)