chore(tests): improve enum examples (#1454)

Author: stainless-app[bot]

tests/api-resources/images.test.ts

@@ -28,7 +28,7 @@ describe('resource images', () => {
       model: 'dall-e-2',
       n: 1,
       response_format: 'url',
-      size: '256x256',
+      size: '1024x1024',
       user: 'user-1234',
     });
   });
@@ -55,7 +55,7 @@ describe('resource images', () => {
       model: 'dall-e-2',
       n: 1,
       response_format: 'url',
-      size: '256x256',
+      size: '1024x1024',
       user: 'user-1234',
     });
   });
@@ -78,7 +78,7 @@ describe('resource images', () => {
       n: 1,
       quality: 'standard',
       response_format: 'url',
-      size: '256x256',
+      size: '1024x1024',
       style: 'vivid',
       user: 'user-1234',
     });