Fix CI by avoiding bugged version of pyproject-metadata package

[aatle]

pyproject-metadata version 0.9.1 has an incorrect dependency minimum version requirement for packaging, sometimes causing crashes during building, when pyproject-metadata==0.9.1 and packaging<23.2. See pypa/pyproject-metadata#239, issue got fixed but version 0.9.1 was released with the bug.

This affected #3379. Then it also failed tests on my fork's main branch, at https://github.com/aatle/pygame-ce/actions/runs/14256274454, so the fact that tests aren't failing on main right now is by chance.

Fix: Require that pyproject-metadata is not 0.9.1.

[oddbookworm]

LGTM! But I’d prefer to see this restriction lifted when the most recent release works

[aatle]

I'm not sure I understand. Won't we still need the restriction when there is a new release of pyproject-metadata?

[oddbookworm]

I'm not sure I understand. Won't we still need the restriction when there is a new release of pyproject-metadata?

Isn't this due to a borked dependency in a specific release version?
Edit: facepalm I shouldn't write things when half awake

[Starbuck5]

Thanks for looking into it!