Update README.md

Author: TheBotBox

README.md

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 # AppsUsageMonitor Library   [![Tweet](https://img.shields.io/twitter/url/http/shields.io.svg?style=social)](https://twitter.com/intent/tweet?text=&via=the_botbox&hashtags=API,UsageStatsManager,android)
-Java library to detech time spend on applications in an android device. 
+Java library to detech time spent on applications in an android device. 
 
 ![-feature-graphic](https://user-images.githubusercontent.com/41512314/55276380-27e33400-5319-11e9-9282-100fce32653a.jpg)