Bump commonmarker from 0.20.0 to 0.20.1 (#1787)

Bumps [commonmarker](https://github.com/gjtorikian/commonmarker) from 0.20.0 to 0.20.1.
- [Release notes](https://github.com/gjtorikian/commonmarker/releases)
- [Commits](https://github.com/gjtorikian/commonmarker/compare/v0.20.0...v0.20.1)

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

Gemfile.lock

@@ -87,7 +87,7 @@ GEM
     chronic_duration (0.10.6)
       numerizer (~> 0.1.1)
     coderay (1.1.2)
-    commonmarker (0.20.0)
+    commonmarker (0.20.1)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.1.5)
     connection_pool (2.2.2)