add badge in readme, fix typo
add badge in readme, fix typo

UniSharp/laravel-filemanager,UniSharp/laravel-filemanager-plus,jonasleitep4/laravel-filemanager,jayked/laravel-filemanager,mikkpokk/laravel-filemanager,jonasleitep4/laravel-filemanager,UniSharp/laravel-filemanager,UniSharp/laravel-filemanager-plus,mikkpokk/laravel-filemanager,UniSharp/laravel-filemanager-plus,mikkpokk/laravel-filemanager,jonasleitep4/laravel-filemanager,jayked/laravel-filemanager,jayked/laravel-filemanager