Fix typo in README.md

Author: Almouro

README.md

@@ -58,7 +58,7 @@ Once you've acquired the CodePush plugin, you need to integrate it into the Xcod
     ![Add CodePush to project](https://cloud.githubusercontent.com/assets/516559/10322414/7688748e-6c32-11e5-83c1-00d3e6758df4.png)
 
 3. Select the project node in Xcode and select the "Build Phases" tab of your project configuration.
-4. Drag `libCodePush.a` from `Libraries/CodePush.xcodeproj/Products` into the "Link Binary With Libraries" secton of your project's "Build Phases" configuration.
+4. Drag `libCodePush.a` from `Libraries/CodePush.xcodeproj/Products` into the "Link Binary With Libraries" section of your project's "Build Phases" configuration.
 
     ![Link CodePush during build](https://cloud.githubusercontent.com/assets/516559/10322221/a75ea066-6c31-11e5-9d88-ff6f6a4d6968.png)