Bug#1055498: greenlet needs an update to 3.x to support Python 3.12

[Thomas Goirand]

Hi,

I need this fix too, to be able to test the fixes for Eventlet. FYI, if 
this can help, the pull request added Py 3.12 support is here:

https://github.com/python-greenlet/greenlet/pull/327

Cheers,

Thomas Goirand (zigo)