add GitHub URL for PyPi

[andriyor]

• I have provided code that clearly demonstrates the bug and that only works correctly when applying this fix
• I have added suitable tests demonstrating a fixed bug or new/changed feature to the test suite in tests/
• I have properly documented new or changed features in the documentation or in the docstrings
• I have properly explained unusual or unexpected code in the comments around it

Warehouse now uses the project_urls provided to display links in the sidebar on this screen, as well as including them in API responses to help automation tool find the source code for Requests.

Docs: packaging.python.org/en/latest/guides/distributing-packages-using-setuptools/#project-urls

[coveralls]

Coverage decreased (-1.9%) to 82.905% when pulling 443dbdf on andriyor:patch-1 into 8eaf3f0 on Zulko:master.

[keikoro]

Tangentially related note: the files which caused the Code format check to fail have meanwhile been fixed.

[keikoro]

Hi, a few things got merged today, among them a fix for broken checks. If you rebased the current master and pushed your changes again, it'd be possible to rerun the workflows for your PR to see where it's at.

[keikoro]

Merging this now, thank you, @andriyor.

For reference for future updates: https://peps.python.org/pep-0345/#project-url-multiple-use