docs($compile): fix typo in the docs templateURL -> templateUrl

Author: IgorMinar

docs/content/api/angular.module.ng.$compileProvider.directive.ngdoc

@@ -407,7 +407,7 @@ compiler}. The attributes are:
     migrates all of the attributes / classes from the old element to the new one. See Creating
     Widgets section below for more information.
 
-  * `templateURL` - Same as `template` but the template is loaded from the specified URL. Because
+  * `templateUrl` - Same as `template` but the template is loaded from the specified URL. Because
     the template loading is asynchronous the compilation/linking is suspended until the template
     is loaded.