Update setup.py (Azure#27272)

Author: msyyc

tools/azure-sdk-tools/packaging_tools/templates/setup.py

@@ -55,6 +55,7 @@
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'License :: OSI Approved :: MIT License',
     ],
     zip_safe=False,