Update README.md

Author: cloudwebrtc

README.md

@@ -81,6 +81,7 @@ The project is inseparable from the contributors of the community.
 - [RainwayApp](https://github.com/rainwayapp) - Sponsor
 - [亢少军](https://github.com/kangshaojun) - Sponsor
 - [ION](https://github.com/pion/ion) - Sponsor
+- [reSipWebRTC](https://github.com/reSipWebRTC) - Sponsor
 
 ### Example