Fix Stanza#source_range_with_comments

- All hail Sorbet for telling me that I forgot to rename this variable!

Library/Homebrew/rubocops/cask/ast/stanza.rb

@@ -28,7 +28,7 @@ module RuboCop
         end
 
         def source_range_with_comments
-          comments.reduce(source_range) do |range, comment|
+          stanza_comments(stanza_node).reduce(source_range) do |range, comment|
             range.join(comment.loc.expression)
           end
         end