Update all URLs in Why section to use HTTPS

Author: CAM-Gerlach

_sections/50-why.md

@@ -11,11 +11,11 @@ style: center
 Here are some resources on why Python 3 was created, and how and why to update
 code to use Python 3:
 
-- [Why Python 3 exists](http://www.snarky.ca/why-python-3-exists) (Brett Cannon)
+- [Why Python 3 exists](https://snarky.ca/why-python-3-exists/) (Brett Cannon)
 - [How to add Python 3 support to your code](https://docs.python.org/3/howto/pyporting.html)
 - [Python FAQ: Why should I use Python 3?](https://eev.ee/blog/2016/07/31/python-faq-why-should-i-use-python-3/) (lexy munroe)
 - [Python FAQ: How do I port to Python 3?](https://eev.ee/blog/2016/07/31/python-faq-how-do-i-port-to-python-3/) (lexy munroe)
-- [Stop supporting Python 2.6 for free](http://www.curiousefficiency.org/posts/2015/04/stop-supporting-python26.html) (Nick Coghlan)
-- [Why Python 4.0 won't be like Python 3.0](http://www.curiousefficiency.org/posts/2014/08/python-4000.html) (Nick Coghlan)
+- [Stop supporting Python 2.6 for free](https://www.curiousefficiency.org/posts/2015/04/stop-supporting-python26.html) (Nick Coghlan)
+- [Why Python 4.0 won't be like Python 3.0](https://www.curiousefficiency.org/posts/2014/08/python-4000.html) (Nick Coghlan)
 - [Python 3 for scientists](https://python-3-for-scientists.readthedocs.io/en/latest/)
 - [scikit-bio py3-only RFC](https://github.com/biocore/scikit-bio-rfcs/blob/master/accepted/002-py3-only.md)