Update README.md

Author: geof90

README.md

@@ -114,7 +114,7 @@ In order to accommodate as many developer preferences as possible, the CodePush
 
     *Note: If you don't already have RNPM installed, you can do so by simply running `npm i -g rnpm` and then executing the above command. If you already have RNPM installed, make sure you have v1.9.0+ in order to benefit from this one step install.*
 
-2. You will be prompted for the deployment key you'd like to use. If you don't already have it, you can retreive this value by running `code-push deployment ls <appName> -k`, or you can choose to ignore it (by simply hitting `<ENTER>`) and add it in later. To get started, we would recommend just using your `Staging` deployment key, so that you can test out the CodePush end-to-end.
+2. You will be prompted for the deployment key you'd like to use. If you don't already have it, you can retrieve this value by running `code-push deployment ls <appName> -k`, or you can choose to ignore it (by simply hitting `<ENTER>`) and add it in later. To get started, we would recommend just using your `Staging` deployment key, so that you can test out the CodePush end-to-end.
 
 And that's it! Isn't RNPM awesome? :)