Update setup.py (#21021)

* Update setup.py

* Update README.md

Author: Rakshith Bhyravabhotla

sdk/eventgrid/azure-eventgrid/README.md

@@ -4,6 +4,10 @@ Azure Event Grid is a fully-managed intelligent event routing service that allow
 
 [Source code][python-eg-src] | [Package (PyPI)][python-eg-pypi] | [API reference documentation][python-eg-ref-docs] | [Product documentation][python-eg-product-docs] | [Samples][python-eg-samples] | [Changelog][python-eg-changelog]
 
+## _Disclaimer_
+
+_Azure SDK Python packages support for Python 2.7 is ending 01 January 2022. For more information and questions, please refer to https://github.com/Azure/azure-sdk-for-python/issues/20691_
+
 ## Getting started
 
 ### Prerequisites

sdk/eventgrid/azure-eventgrid/setup.py

@@ -71,6 +71,7 @@
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'License :: OSI Approved :: MIT License',
     ],
     zip_safe=False,