Update setup.py

Author: RobertoPrevato

setup.py

@@ -22,6 +22,7 @@ def readme():
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Operating System :: OS Independent",
     ],
     url="https://github.com/Neoteroi/essentials-openapi",