Fix default_url_generator

This is the URL that this module defines:

    dj_rest_auth/urls.py:    path('password/reset/confirm/', PasswordResetConfirmView.as_view(), name='rest_password_reset_confirm'),

As such, the URL name it should use is rest_password_reset_confirm

dj_rest_auth/forms.py

@@ -21,7 +21,7 @@
 
 def default_url_generator(request, user, temp_key):
     path = reverse(
-        'password_reset_confirm',
+        'rest_password_reset_confirm',
         args=[user_pk_to_url_str(user), temp_key],
     )