v5 update fixes

app/Filament/Resources/CheckoutResource.php

@@ -5,8 +5,9 @@ namespace App\Filament\Resources;
 use App\Filament\Resources\CheckoutResource\Pages;
 use App\Filament\Resources\CheckoutResource\RelationManagers;
 use App\Models\Checkout;
-use Filament\Forms;
-use Filament\Forms\Form;
+use UnitEnum;
+use BackedEnum;
+use Filament\Schemas\Schema;
 use Filament\Resources\Resource;
 use Filament\Tables\Table;
 use Filament\Tables;
@@ -23,14 +24,14 @@ class CheckoutResource extends Resource
 {
     protected static ?string $model = Checkout::class;
 
-    protected static ?string $navigationIcon = 'heroicon-o-rectangle-stack';
+    protected static string | BackedEnum | null $navigationIcon = 'heroicon-o-rectangle-stack';
 
-    protected static ?string $navigationGroup = 'Silent Auction';
+    protected static string | UnitEnum | null $navigationGroup = 'Silent Auction';
 
-    public static function form(Form $form): Form
+    public static function form(Schema $schema): Schema
     {
-        return $form
-            ->schema([
+        return $schema
+            ->components([
             Select::make('bidder_num')
                 ->label('Bidder')
                 ->options(