Remove lingering references to the 'guides' app from publisher readme
Remove lingering references to the 'guides' app from publisher readme

guides was the previous name of this app

theodi/publisher,leftees/publisher,theodi/publisher,alphagov/publisher,telekomatrix/publisher,leftees/publisher,telekomatrix/publisher,alphagov/publisher,theodi/publisher,leftees/publisher,theodi/publisher,alphagov/publisher,telekomatrix/publisher,telekomatrix/publisher,leftees/publisher