[ci skip] Fix 4.2 release notes list items. [Matthew Draper & Juanito Fatas]

![screenshot 2014-07-09 16 22 19](https://cloud.githubusercontent.com/assets/1000669/3521628/3bf53b1e-0742-11e4-927d-16049a0d8be7.png)

![screenshot 2014-07-09 16 22 25](https://cloud.githubusercontent.com/assets/1000669/3521627/3bec6ed0-0742-11e4-926c-0184c9240fed.png)

![screenshot 2014-07-09 16 22 33](https://cloud.githubusercontent.com/assets/1000669/3521626/3bc8d236-0742-11e4-9ad2-cdfc2fcc68e3.png)

This follow the style guidelines and renders correctly.

Thanks to @matthewd! As per #16102.