Removed beta flag from Manage Authenticators MFA
Removed beta flag from Manage Authenticators MFA

Removed beta flag from Manage Authenticators MFA docs, as it's a released feature.
jeffreylees/docs,yvonnewilson/docs,yvonnewilson/docs,yvonnewilson/docs,auth0/docs,jeffreylees/docs,jeffreylees/docs,auth0/docs,auth0/docs