[FEATURE] set homepage for pypi project

[milahu]

pypi project: https://pypi.org/project/flask-session2/
homepage: https://github.com/christopherpickering/flask-session2

[christopherpickering]

I wonder why it doesn't show up, it's in the pyproject file and looks right. I probably just need to do a release, maybe it was updated after the last release.