Wrap announcement in the message component

content/guides/box-ai/ai-tutorials/extract-metadata-structured.md

@@ -28,6 +28,7 @@ To learn more about creating templates, see [Creating metadata templates in the
 
 Make sure you followed the steps listed in [getting started with Box AI][prereq] to create a custom app and authenticate.
 
+<Message type="notice">
 ### Upcoming breaking change
 
 We would like to announce a planned breaking change in the Box AI API - Extract Structured endpoint. This change will bring improvements to the response by introducing additional fields and nesting the metadata key-value pairs within the answer object. **This change is planned to be released mid-January**. Be sure to follow our [changelog][changelog] and announcements on our [Box Developer Blog][blog]. See code snippets:
@@ -54,6 +55,7 @@ New response format example:
   "created_at": "2012-12-12T10:53:43-08:00"
 }
 ```
+</Message>
 
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