Merge pull request cloudfoundry#1742 from cloudfoundry/dependabot/bundler/docs/v3/rouge-3.21.0

build(deps): bump rouge from 3.19.0 to 3.21.0 in /docs/v3


[Finishes #173838447]

Author: selzoc

docs/v3/Gemfile.lock

@@ -118,7 +118,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.0)
-    rouge (1.10.1)
+    rouge (1.11.1)
     sass (3.4.25)
     sprockets (2.12.5)
       hike (~> 1.2)