Fix typo in the docs instructions

Author: ArturMoczulski

README.md

@@ -6,7 +6,7 @@ Rollbar error monitoring integration for Laravel projects. This library adds a l
 
 1. [Sign up for a Rollbar account](https://rollbar.com/signup)
 2. If you're using Laravel 5.6 and up follow [Installation](https://docs.rollbar.com/docs/laravel#section-installation) instructions in our [Laravel 5.6 and up SDK docs](https://docs.rollbar.com/docs/laravel)
-3. If you're using Laravel 5.5 or lower follow [Installation](https://docs.rollbar.com/v1.0.0/docs/laravel-55-and-lower#section-installation) instructions in our [Laravel 5.6 and up SDK docs](https://docs.rollbar.com/v1.0.0/docs/laravel-55-and-lower)
+3. If you're using Laravel 5.5 or lower follow [Installation](https://docs.rollbar.com/v1.0.0/docs/laravel-55-and-lower#section-installation) instructions in our [Laravel 5.5 and lower SDK docs](https://docs.rollbar.com/v1.0.0/docs/laravel-55-and-lower)
 
 ## Usage and Reference