Update index.md
Update index.md

In the past the method to login with passwordless was called 'passwordlessVerify', so it could have made sense that section was called "Verify Passwordless" . Now the method is called "passwordlessLogin", so I think it's better to use "Passwordless Login" as the title.
jeffreylees/docs,auth0/docs,auth0/docs,auth0/docs,jeffreylees/docs,jeffreylees/docs