Address Alex's feedback

reference/catalog/products_catalog.v3.yml

@@ -1279,13 +1279,19 @@ paths:
 
         **Usage Notes**
         - `image_url` - `255` character limit
-        - For file uploads, use the `multipart/form-data` media type. See [Adding product images](/docs/store-operations/catalog#adding-product-images) for more information.
+        - `Content-Type` - For `image_file`, use the `multipart/form-data` media type. For `image_url`, use the application/json type. See [Adding product images](/docs/store-operations/catalog#adding-product-images) for more information.
         - You can create only one image at a time. A product can have up to 1000 images.
         - Supported image file types are BMP, GIF, JPEG, PNG, WBMP, XBM, and WEBP.
         - Each image file or image uploaded by URL can be up to 8 MB.
       operationId: createProductImage
       parameters:
-        - $ref: '#/components/parameters/MultipartContentType'
+        name: Content-Type
+        in: header
+        required: true
+        description: 'The [MIME type](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types) of the request body.'
+        schema:
+          type: string
+          enum: [application/json, multipart/form-data]
       requestBody:
         content:
           application/json:
@@ -8802,7 +8808,7 @@ components:
         type: string
         default: 'application/json'
     MultipartContentType:
-      name: Content-Type
+      name: MultipartContent-Type
       in: header
       required: true
       description: 'The [MIME type](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types) of the request body.'