docs(): update tutorial links,

techsolx commented 1 year ago

* update tutorial links use new url https://learn.astropy.org
* add .python-version to .gitignore

Tested via jupyter notebook as referenced in README.md, no issues noted.

[X] Check the box to confirm that you are familiar with the contributing guidelines and/or indicate (check the box) that you are familiar with our contributing workflow.
[X] Confirm that any contributed tutorials contain a complete Introduction which includes an Author list, Learning Goals, Keywords, Companion Content (if applicable), and a Summary.
[X] Check the box to confirm that you are familiar with the Astropy community code of conduct and you agree to follow the CoC.

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techsolx commented 7 months ago

Gentlest bump...

astropy / astropy-tutorials