Commit 04a58d5 removed the Heroku instant deploy button but the docs
still mention this as an option, this commit updates the docs to reflect
this change.
when `heroku run python manage.py check --deploy` is ran this error occurs
?: (security.W009) Your SECRET_KEY has less than 50 characters or less than 5 unique characters. Please generate a long and random SECRET_KEY, otherwise many of Django's security-critical features will be vulnerable to attack.
changing the num of ran to a larger number fixes this issue
