Fix README formatting

Italicized text was unclosed

Author: Sean-Der

README.md

@@ -71,7 +71,7 @@ Check out the **[contributing wiki](https://github.com/pions/webrtc/wiki/Contrib
 * [Michael MacDonald](https://github.com/mjmac)
 * [Oleg Kovalov](https://github.com/cristaloleg) *Use wildcards instead of hardcoding travis-ci config*
 * [Woodrow Douglass](https://github.com/wdouglass) *RTCP, RTP improvements*
-* [Tobias Fridén](https://github.com/tobiasfriden) *SRTP authentication verification
+* [Tobias Fridén](https://github.com/tobiasfriden) *SRTP authentication verification*
 
 ### License
 MIT License - see [LICENSE](LICENSE) for full text