update changelog (Azure#20958)

* update changelog

* updates

Author: xiangyan99

sdk/core/azure-core/CHANGELOG.md

@@ -2,8 +2,6 @@
 
 ## 1.19.0 (2021-09-30)
 
-### Features Added
-
 ### Breaking Changes in the Provisional `azure.core.rest` package
 
 - `azure.core.rest.HttpResponse` and `azure.core.rest.AsyncHttpResponse` are now abstract base classes. They should not be initialized directly, instead
@@ -12,10 +10,6 @@ your transport responses should inherit from them and implement them.
 
 - HttpLoggingPolicy integrates logs into one record #19925
 
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.18.0 (2021-09-02)
 
 ### Features Added

sdk/core/azure-core/README.md

@@ -8,6 +8,10 @@ If you are a client library developer, please reference [client library develope
 
 [Source code](https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/core/azure-core/) | [Package (Pypi)][package] | [API reference documentation](https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/core/azure-core/)
 
+## _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
 
 Typically, you will not need to install azure core;

sdk/core/azure-core/setup.py

@@ -54,6 +54,7 @@
         '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,