[docs] secrets.compare_digest still ranks poorly for "python constant time string comparison"

[Kevin Burke]

Hi,
I'm not sure of exactly the way to fix this, but I needed to use
constant time string comparison today, and all of the top results on
Google for this problem still point to third party libraries.

Perhaps a targeted effort could generate more links to
https://docs.python.org/3/library/secrets.html, and publicly available
sources and third party libraries could have their README's point to
this library as well.

Kevin

-- 
Kevin Burke
phone: 925.271.7005 | kev.inburke.com