append useful documentation about using cocoapods

Author: AurelGit

docs/setup cocoapods.md

@@ -83,7 +83,7 @@ That's all ! :tada:
 
 
 - You must always use the `.xcworkspace` file inside Xcode instead of the `.xcodeproj` one.
-- Sometimes, running `react-native link  will automatically try to perform a pod install. Read carefuly each thirdparty package install doc.`
+- Sometimes, running `react-native link`  will automatically try to perform a pod install. Read carefuly each thirdparty package install doc.`
 
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