Fix test_prof RuboCop plugin

Author: Rylan12

Library/Homebrew/utils/rubocop.rb

@@ -10,7 +10,7 @@
 end
 
 # TestProf is not able to detect what version of RuboCop we're using, so we need to manually import its cops.
-# For more details, see https://github.com/test-prof/test-prof/blob/v1.4.4/lib/test_prof/rubocop.rb
+# For more details, see https://github.com/test-prof/test-prof/blob/v1.5.0/lib/test_prof/rubocop.rb
 Warnings.ignore(/TestProf cops require RuboCop >= 0.51.0 to run/) do
   # All this file does is check the RuboCop version and require the files below.
   # If we don't require this now while the warning is ignored, we'll see the warning again later
@@ -19,9 +19,7 @@
 
   # This is copied from test-prof/rubocop.rb, and is necessary because that file returns early if the RuboCop version
   # check isn't met.
-  # Note: when the next version of TestProf is released, this will need to change to support RuboCop's plugin system.
-  # See: https://github.com/test-prof/test-prof/pull/321
-  require "test_prof/cops/inject"
+  require "test_prof/cops/plugin"
   require "test_prof/cops/rspec/aggregate_examples"
 end