Exclude benchmarks from the spec Rake task

lib/tasks/spec.rake

@@ -42,7 +42,7 @@ desc "GitLab | Run specs"
 task :spec do
   cmds = [
     %W(rake gitlab:setup),
-    %W(rspec spec),
+    %W(rspec spec --tag ~@benchmark),
   ]
   run_commands(cmds)
 end