Fix typo in README
Fix typo in README

daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,catterbu/receptormarker,nsh87/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,catterbu/receptormarker,catterbu/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,nsh87/receptormarker