s/OpenSource/open-source/.

README.md

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 Jitsi Meet - Secure, Simple and Scalable Video Conferences 
 ====
-Jitsi Meet is an OpenSource (MIT) WebRTC JavaScript application that uses [Jitsi Videobridge](https://jitsi.org/videobridge) to provide high quality, scalable video conferences. You can see [Jitsi Meet in action](http://youtu.be/7vFUVClsNh0) here at the 482 session of the VoIP Users Conference.
+Jitsi Meet is an open-source (MIT) WebRTC JavaScript application that uses [Jitsi Videobridge](https://jitsi.org/videobridge) to provide high quality, scalable video conferences. You can see [Jitsi Meet in action](http://youtu.be/7vFUVClsNh0) here at the 482 session of the VoIP Users Conference.
 
 You can also try it out yourself at https://meet.jit.si .