Fixed advice on invalid permissions on upload path

lib/tasks/gitlab/check.rake

@@ -303,7 +303,7 @@ namespace :gitlab do
       else
         puts "no".red
         try_fixing_it(
-          "sudo find #{upload_path} -type d -not -path #{upload_path} -exec chmod 0700 {} \\;"
+          "sudo chmod 700 #{upload_path}"
         )
         for_more_information(
           see_installation_guide_section "GitLab"