Fix cookstyle task in Rakefile

Rakefile

@@ -2,12 +2,12 @@ begin
   require 'cookstyle'
   require 'rubocop/rake_task'
 
-  desc 'Run Ruby style checks'
+  desc 'Run Cookstyle checks'
   RuboCop::RakeTask.new(:cookstyle)
 rescue LoadError
   desc 'rubocop rake task not available'
   task :cookstyle do
-    abort 'Rubocop/Chefstyle rake task is not available. Be sure to install rubocop and cookstyle'
+    abort 'Rubocop/Cookstyle rake task is not available. Be sure to install rubocop and cookstyle'
   end
 end
 
@@ -52,4 +52,4 @@ rescue LoadError
   end
 end
 
-task default: %w(rubocop foodcritic chefspec kitchen:all)
+task default: %w(cookstyle chefspec kitchen:all)