[MacPorts] #68442: py-gevent: update to 23.9.1

[MacPorts]

#68442: py-gevent: update to 23.9.1
---------------------------+-----------------------
 Reporter:  contextnerror  |      Owner:  (none)
     Type:  update         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:
 Keywords:  security       |       Port:  py-gevent
---------------------------+-----------------------
 This update fixes [https://github.com/advisories/GHSA-x7m3-jprg-wc5g
 CVE-2023-41419].\\
 Version 22.10 and later do not support < 3.8, so a new version check would
 need to be added.\\
 Slightly related, the current version check in the portfile does not line
 up with the [https://www.gevent.org/install.html#older-versions-of-python
 officially provided table].

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Ticket URL: <https://trac.macports.org/ticket/68442>
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