Fixed missing documentation Email Backend configuration in Development Environment

Fixed missing documentation Email Backend configuration in Development Environment:

old:


-DJANGO_EMAIL_BACKEND                    EMAIL_BACKEND               **django.core.mail.backends.smtp.EmailBackend** django.core.mail.backends.smtp.EmailBackend

new:

+DJANGO_EMAIL_BACKEND                    EMAIL_BACKEND               **django.core.mail.backends.console.EmailBackend** django.core.mail.backends.smtp.EmailBackend