requirements: bump gevent to 24.11.2

Bump `gevent` version to 24.11.2 to avoid the following issue with
installation in a Python 3.12 environment:

Error compiling Cython file:
------------------------------------------------------------
...
cdef tuple integer_types

if sys.version_info[0] >= 3:
  integer_types = int,
else:
  integer_types = (int, long)
			^
------------------------------------------------------------
src/gevent/libev/corecext.pyx:60:26: undeclared name not builtin: long

Version `24.*` doesn't support Python 3.7 and Python 3.8, so continue
using `22.*` version for these versions.

requirements.txt

@@ -1,3 +1,4 @@
 # Pin pyyaml to 5.3.1 until yaml/pyyaml#724 is fixed.
 PyYAML==5.3.1
-gevent==22.10.2
+gevent==22.10.2; python_version <= '3.8'
+gevent==24.11.1; python_version > '3.8'