Add Python article feed

[stefmolin]

ADD FEED

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Hi, I want to add my feed to the Python Planet.

I checked the following required validations: (mark all 5 with [x])

1. [x] My feed is valid, I checked using https://validator.w3.org/feed/check.cgi?url=https://stefaniemolin.com/feeds/Python-atom.xml and it is valid!
2. [x] My feed is a Python Specific feed, e.g: I am proposing the filtered tag or categorized feed url
3. [x] I only post content to this feed which is related to the Python language and its components and libraries. Or content that I consider interesting for the Python community.
4. [x] I am aware that once my feed is added it can take a few hours to start being fetched (according to the server update cycle)
5. [x] My feed contains only content in English language.

Thanks in advance for adding my feed to the PythonPlanet! :+1:

Fixes https://github.com/python/planet/issues/564