fix description

Author: erinkav-openai

openapi.yaml

@@ -8592,7 +8592,7 @@ components:
           description: |
             The intended purpose of the uploaded file.
 
-            Use "assistants" for [Assistants](/docs/api-reference/assistants) and [Message](/docs/api-reference/messages) files, "vision" for Assistants   "batch" for [Batch API](/docs/guides/batch), and "fine-tune" for [Fine-tuning](/docs/api-reference/fine-tuning).
+            Use "assistants" for [Assistants](/docs/api-reference/assistants) and [Message](/docs/api-reference/messages) files, "vision" for Assistants image file inputs, "batch" for [Batch API](/docs/guides/batch), and "fine-tune" for [Fine-tuning](/docs/api-reference/fine-tuning).
           type: string
           enum: ["assistants", "batch", "fine-tune"]
       required: