Fix ProductLicensesRelationManager Filament 5 compatibility

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: simonhamp

app/Filament/Resources/UserResource/RelationManagers/ProductLicensesRelationManager.php

@@ -3,8 +3,8 @@
 namespace App\Filament\Resources\UserResource\RelationManagers;
 
 use Filament\Forms;
-use Filament\Forms\Form;
 use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Schemas\Schema;
 use Filament\Tables;
 use Filament\Tables\Table;
 
@@ -14,7 +14,7 @@ class ProductLicensesRelationManager extends RelationManager
 
     protected static ?string $title = 'Products';
 
-    public function form(Form $form): Form
+    public function form(Schema $form): Schema
     {
         return $form
             ->schema([