Add `pt-PT` in supported locales.
Add `pt-PT` in supported locales.

akatsoulas/mozillians,fxa90id/mozillians,fxa90id/mozillians,brian-yang/mozillians,fxa90id/mozillians,mozilla/mozillians,johngian/mozillians,anistark/mozillians,brian-yang/mozillians,mozilla/mozillians,akatsoulas/mozillians,johngian/mozillians,brian-yang/mozillians,johngian/mozillians,anistark/mozillians,anistark/mozillians,johngian/mozillians,fxa90id/mozillians,brian-yang/mozillians,akatsoulas/mozillians,mozilla/mozillians,anistark/mozillians,akatsoulas/mozillians,mozilla/mozillians