Change the order of prompts to make all the samples consistent

Author: justinyoo

docs/guides/images-vision/responses/analyze_images_passing_file.cs

@@ -24,8 +24,8 @@
 
 OpenAIResponse response = (OpenAIResponse)client.CreateResponse([
     ResponseItem.CreateUserMessageItem([
-        ResponseContentPart.CreateInputImagePart(file.Id),
-        ResponseContentPart.CreateInputTextPart("what's in this image?")
+        ResponseContentPart.CreateInputTextPart("what's in this image?"),
+        ResponseContentPart.CreateInputImagePart(file.Id)
     ])
 ]);