[#33048] Wrong JText causes mixed string use

this change is regarding Joomla tracker issue [#33048] Wrong JText causes mixed string use
There is a redundant opening before 'COM_USERS_REGISTRATION_SAVE_FAILED'. It should be:
   $this->setError('COM_USERS_REGISTRATION_SAVE_FAILED', $user->getError());

Please @jo-sf change your patch to update the Pull Request. Thank you