Adding aspect ratio example (#979)

* Adding aspect ratio example
* Minimum version

Author: Giom-V

quickstarts-js/Image_out.js

@@ -52,7 +52,7 @@ ai = new GoogleGenAI({ apiKey: process.env.GEMINI_API_KEY });
 */
 
 // [CODE STARTS]
-module = await import("https://esm.sh/@google/genai@1.4.0");
+module = await import("https://esm.sh/@google/genai@1.22.0");
 GoogleGenAI = module.GoogleGenAI;
 ai = new GoogleGenAI({ apiKey: process.env.GEMINI_API_KEY });
 
@@ -154,7 +154,13 @@ response = await ai.models.generateContent({
         mimeType: "image/png"
       }
     }
-  ]
+  ],
+  config: {
+    responseModalities: [Modality.IMAGE],
+    imageConfig: {
+      aspectRatio: "16:9"
+    },
+  }
 });
 
 for (const part of response.candidates[0].content.parts) {
@@ -498,3 +504,5 @@ Gemini is not only good at generating images, but also at understanding them. Ch
 
 
 */
+
+