Fixed the spelling of 'automatically'

README.md

@@ -122,7 +122,7 @@ NSOperationQueue *queue = [[[NSOperationQueue alloc] init] autorelease];
 
 AFNetworking requires either [iOS 4.0](http://developer.apple.com/library/ios/#releasenotes/General/WhatsNewIniPhoneOS/Articles/iPhoneOS4.html%23//apple_ref/doc/uid/TP40009559-SW1) and above, or [Mac OS 10.6](http://developer.apple.com/library/mac/#releasenotes/MacOSX/WhatsNewInOSX/Articles/MacOSX10_6.html#//apple_ref/doc/uid/TP40008898-SW7) and above.
 
-AFNetworking uses [`NSJSONSerialization`](http://developer.apple.com/library/mac/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html) if it is available. If your app targets a platform where this class is not available you can include one of the following JSON libraries to your project for AFNetworking to automaticly detect and use.
+AFNetworking uses [`NSJSONSerialization`](http://developer.apple.com/library/mac/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html) if it is available. If your app targets a platform where this class is not available you can include one of the following JSON libraries to your project for AFNetworking to automatically detect and use.
 
 * [JSONKit](https://github.com/johnezang/JSONKit)
 * [SBJson](http://stig.github.com/json-framework/)