Update link that was failing on CI

[willingc]

---

📚 Documentation preview 📚: https://python-packaging-user-guide--1507.org.readthedocs.build/en/1507/

[webknjaz]

(tutorials/installing-packages: line  444) broken    https://stackoverflow.com/questions/14637979/how-to-permanently-set-path-on-linux-unix/14638025#14638025 - 403 Client Error: Forbidden for url: https://stackoverflow.com/questions/14637979/how-to-permanently-set-path-on-linux-unix/14638025

Extend https://github.com/pypa/packaging.python.org/blob/4c86169/source/conf.py#L102-L110 instead. They probably just blocked all GitHub's IP addresses or something.

[willingc]

Thanks for the review and suggestion @webknjaz. I've opted to remove the link to SO since it doesn't add much additional value.

[webknjaz]

Why do you think it doesn't?

[webknjaz]

@dukecat0 @jwodder @theacodes since you were the ones to touch/add that link, do you have any opinion on keeping or dropping it?

[dukecat0]

I personally prefer keeping it as a quick reference for beginners, who are the main audience of this tutorial.

[webknjaz]

Yeah, that's my concern as well. I prefer keeping the reference and ignoring the link instead.

[willingc]

Sounds good. I'll add back the link.

[willingc]

Close and replace with #1510 to ignore stack overflow for linkchecks