docs(faq): Updated faq.rst with updated article link
docs(faq): Updated faq.rst with updated article link

I combined my three articles related to django-allauth into one and updated it recently. I have updated the link.
rsalmaso/django-allauth,bittner/django-allauth,bittner/django-allauth,rsalmaso/django-allauth,pennersr/django-allauth,pennersr/django-allauth,bittner/django-allauth,rsalmaso/django-allauth,pennersr/django-allauth