Update WORKING-GROUPS.md (#1238)

WORKING-GROUPS.md

@@ -79,7 +79,7 @@ Each working group has one or more leads which coordinate the activities of the
 <img width="30px" src="https://avatars3.githubusercontent.com/u/3237651?s=400&v=4">  | [Ed Snible](https://github.com/esnible)            | IBM        | User Experience
 &nbsp;                                                                               | [Lei Tang](https://github.com/lei-tang)            | Google     | Security, Extensions and Telemetry
 <img width="30px" src="https://avatars1.githubusercontent.com/u/10537847?s=400&v=4"> | [Eric Van Norman](https://github.com/ericvn)       | IBM        | Test and Release
-<img width="30px" src="https://avatars0.githubusercontent.com/u/1016047?s=400&v=4">  | [Lizan Zhou](https://github.com/lizan)             | Tetrate    | Networking - Data Plane, Security
+<img width="30px" src="https://avatars0.githubusercontent.com/u/1016047?s=400&v=4">  | [Lizan Zhou](https://github.com/lizan)             | Aviatrix    | Networking - Data Plane, Security
 ## Getting in touch
 
 If you'd like to reach out to the working group leads, please drop a note to [[email protected]](mailto:[email protected]).