pppoe: ipv6: T2681: script bugfix after get_config_dict() migration
pppoe: ipv6: T2681: script bugfix after get_config_dict() migration

Commit 65fa21f5 ("ifconfig: T2653: move pppoe interface to get_config_dict()")
did not rename the Jinja2 template vars as required as they are not retrieved
directly as dict from the config backend.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x