build(deps): bump gevent from 20.5.0 to 23.9.0

Bumps [gevent](https://github.com/gevent/gevent) from 20.5.0 to 23.9.0.
- [Release notes](https://github.com/gevent/gevent/releases)
- [Changelog](https://github.com/gevent/gevent/blob/master/docs/changelog_pre.rst)
- [Commits](gevent/gevent@20.5.0...23.9.0)

---
updated-dependencies:
- dependency-name: gevent
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

test-requirements.txt

@@ -8,7 +8,7 @@ pure-sasl
 twisted[tls]; python_version >= '3.5'
 twisted[tls]==19.2.1; python_version < '3.5'
 gevent>=1.0; platform_machine != 'i686' and platform_machine != 'win32'
-gevent==20.5.0; platform_machine == 'i686' or platform_machine == 'win32'
+gevent==23.9.0; platform_machine == 'i686' or platform_machine == 'win32'
 eventlet>=0.33.3
 cython
 packaging