Remove OpenStruct from primer_octicon cop (#3055)

Author: camertron

.changeset/olive-hats-applaud.md

@@ -0,0 +1,5 @@
+---
+'@primer/view-components': patch
+---
+
+Remove OpenStruct from primer_octicon cop

lib/rubocop/cop/primer/primer_octicon.rb

@@ -200,7 +200,7 @@ def string_args_to_string(node)
         def kwargs(node)
           return node.arguments.last if node.arguments.size > 1
 
-          OpenStruct.new(keys: [], pairs: [], type: :hash)
+          RuboCop::AST::HashNode.new("hash")
         end
 
         def icon(node)