Upgrade cython to 0.29.32

[mkoeppe]

https://cython.readthedocs.io/en/latest/src/changes.html#id27

Component: packages: standard

Keywords: upgrade

Author: Samuel Lelièvre

Branch/Commit: a2f7980

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/34237

[slel]

Author: Samuel Lelièvre

[slel]

New commits:

a2f7980

24237: upgrade; Cython 0.29.32

[slel]

Commit: a2f7980

[slel]

Changed keywords from none to upgrade

[slel]

Branch: u/slelievre/34237

[mkoeppe]

Reviewer: Matthias Koeppe

[vbraun]

Changed branch from u/slelievre/34237 to a2f7980