stack/slapos: version up gevent 23.9.1 ( py3 only )

stack/slapos.cfg

@@ -189,7 +189,7 @@ Flask = 3.0.0:whl
 frozenlist = 1.4.0:whl
 funcsigs = 1.0.2
 functools32 = 3.2.3.post2
-gevent = 20.9.0
+gevent = 23.9.1
 geventmp = 0.0.1
 gitdb = 4.0.10
 GitPython = 3.1.30
@@ -362,6 +362,7 @@ click = 6.7
 distro = 1.6.0
 feedparser = 5.2.1
 Flask = 1.1.2
+gevent = 20.9.0
 gitdb2 = 2.0.5
 GitPython = 2.1.11
 greenlet = 0.4.17