how can i sort a list of categories in alphabetical order in laravel

This is my index function in controller page of category , i want to arrange all categories in alphabetical order , right now my categories are sorted with id number , what code i have to add

this is code in controller page of category-

public function index(Request $request)
{
    $data = Data::orderBy('category_name')->get();
    return view('auth.category');
}

& that is code in model page of category-

class addcategory extends Model{
    use HasFactory;

    public static function insert($array){
        $data= DB::table('tbl_category')->insert($array);
        return $data;
    }
}