Update python classifier in setup.cfg

As per the current release tested runtime, we test
python version from 3.8 to 3.11 so updating the
same in python classifier in setup.cfg

Change-Id: I5f399edc6c553c65581b02d043d29f2170ac41e3

Author: Ghanshyam Mann

setup.cfg

@@ -18,6 +18,7 @@ classifier =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
 
 [files]
 packages =