Update README.md (microsoft#321)

Co-authored-by: Qingyun Wu <[email protected]>

Author: IshitaPathak

README.md

@@ -197,6 +197,11 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 For more information, see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
 contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
 
+## Contributers Wall
+<a href="https://github.com/microsoft/autogen/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=microsoft/autogen" />
+</a>
+
 # Legal Notices
 
 Microsoft and any contributors grant you a license to the Microsoft documentation and other content