Replace management portal URL with variable
Replace management portal URL with variable

Replaced instances of `https://www.manage.auth0.com` with `${uiURL}`
khorne3/docs,auth0/docs,auth0/docs,jeffreylees/docs,sandrinodimattia/docs,yvonnewilson/docs,yvonnewilson/docs,hamzawi06/docs,khorne3/docs,hamzawi06/docs,khorne3/docs,hamzawi06/docs,Annyv2/docs,Catografix/docs,Catografix/docs,sandrinodimattia/docs,auth0/docs,Annyv2/docs,yvonnewilson/docs,jeffreylees/docs,jeffreylees/docs,Catografix/docs,sandrinodimattia/docs,Annyv2/docs