Update README.md

Author: TheMY3

README.md

@@ -1,5 +1,5 @@
 # Laravel RBAC
-Simple RBAC/ACL for Laravel 5.5 and more with caching permissions and permission groups for better convenience.
+Simple RBAC/ACL for Laravel 8 and more with caching permissions and permission groups for better convenience.
 
 - [Installation](#installation)
 - [Usage](#usage)
@@ -294,4 +294,4 @@ You can check roles and permissions in Blade like this:
 
 ## License
 
-Laravel RBAC is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT)
+Laravel RBAC is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT)