Fixed 950 Fixed a tiny typo in maintainer updates popup

BEFORE 
![mantainer_updates](https://f.cloud.github.com/assets/954858/2430468/d0ed3118-ace3-11e3-979b-ff7b6b20b7c5.png)

AFTER
![improvd_mantainer_update](https://f.cloud.github.com/assets/954858/2430472/33c9d8f4-ace4-11e3-8c17-9caa462e898d.png)