Update vanilla.md
Update vanilla.md

Update tutorial to fix issue https://github.com/auth0/docs/issues/617
yvonnewilson/docs,yvonnewilson/docs,jeffreylees/docs,Catografix/docs,jeffreylees/docs,khorne3/docs,miparnisari/docs,hamzawi06/docs,auth0/docs,Catografix/docs,jeffreylees/docs,sandrinodimattia/docs,Catografix/docs,Annyv2/docs,khorne3/docs,sandrinodimattia/docs,khorne3/docs,Annyv2/docs,auth0/docs,sandrinodimattia/docs,Annyv2/docs,hamzawi06/docs,yvonnewilson/docs,hamzawi06/docs,auth0/docs