fix: Dall-E image generation examples

examples/image-generator-dall-e-2.php

@@ -15,10 +15,9 @@
 $platform = PlatformFactory::create($_ENV['OPENAI_API_KEY']);
 
 $response = $platform->request(
-    model: new DallE(),
+    model: new DallE(), // Utilize Dall-E 2 version in default
     input: 'A cartoon-style elephant with a long trunk and large ears.',
     options: [
-        'version' => DallE::DALL_E_2, // Utilize Dall-E 2 version
         'response_format' => 'url', // Generate response as URL
         'n' => 2, // Generate multiple images for example
     ],

examples/image-generator-dall-e-3.php

@@ -17,10 +17,10 @@
 $platform = PlatformFactory::create($_ENV['OPENAI_API_KEY']);
 
 $response = $platform->request(
-    model: new DallE(),
+    model: new DallE(version: DallE::DALL_E_3),
     input: 'A cartoon-style elephant with a long trunk and large ears.',
     options: [
-        'version' => DallE::DALL_E_3, // Utilize Dall-E 3 version
+        'response_format' => 'url', // Generate response as URL
     ],
 );