Update README.md

Author: MahdiMajidzadeh

Diff for: README.md

@@ -15,7 +15,7 @@ $ composer require mahdimajidzadeh/kavenegar
 If you do not run Laravel 5.5 (or higher), then add the service provider in config/app.php:
 
 ```
-MahdiMajidzadeh\kavenegar\KavenegarServiceProvider:class
+MahdiMajidzadeh\Kavenegar\KavenegarServiceProvider:class
 ```
 
 If you do run the package on Laravel 5.5+, package auto-discovery takes care of the magic of adding the service provider.