Updating the CookieGroupBaseProcessView class in cookie_consent.views

[alahdal]

The SuccessURLAllowedHostsMixin was replaced by RedirectURLMixin as per Django 4.1 documentation "The undocumented django.contrib.auth.views.SuccessURLAllowedHostsMixin mixin is replaced by RedirectURLMixin."

Source https://docs.djangoproject.com/en/4.1/releases/4.1/