Route::webHooks(..) not correctly named

[corbosman]

Hi, in your documentation you say that Route::webHooks(..) should be called, but your code registers a macro webhooks. (without capital H). I wasn't sure if your documentation or your code is wrong, so I didnt do a PR.

This issue causes an exception

{"exception":"[object] (InvalidArgumentException(code: 0): Attribute [webHooks] does not exist. at /Users/cor/Code/docker-webhook/vendor/laravel/framework/src/Illuminate/Routing/RouteRegistrar.php:94)

[freekmurze]

Fixed it in the readme. Thanks!