Merge pull request #26160 from prathamesh-sonpatki/use-encoding-from-metal

AC::Metal is already defining default encoding as UTF 8, let's reuse it.

actionpack/lib/action_controller/metal/parameter_encoding.rb

@@ -17,7 +17,7 @@ def encoding_for_param(action, param) # :nodoc:
         if @_parameter_encodings[action.to_s] && @_parameter_encodings[action.to_s][param.to_s]
           @_parameter_encodings[action.to_s][param.to_s]
         else
-          ::Encoding::UTF_8
+          super
         end
       end