Log Message:
py-greenlet: updated to 3.1.1

3.1.1 (2024-09-20)

- Fix crashes on 32-bit PPC Linux. Note that there is no CI for this,
  and support is best effort; there may be other issues lurking.
- Remove unnecessary logging sometimes during interpreter shutdown.
- Fix some crashes on 32-bit PPC MacOS. This is a very old platform,
  and is only known to be tested on beta versions of an operating
  system that was never released, using the GCC 14 only provided by
  MacPorts; it may or may not work on the final MacOS X release that
  supported 32-bit PowerPC. It has the known issue of leaking memory
  when greenlets are used in multiple threads. Help debugging this
  would be appreciated.