feat: Add auto-edit demo image and note for GCP upload

- Add an auto-edit demo image to the documentation
- Include a note indicating the image needs to be uploaded to GCP

Author: jdorfman

docs/cody/capabilities/auto-edit.mdx

@@ -20,6 +20,10 @@
 
 Auto-edit is available exclusively for Pro and Enterprise users during the experimental release phase. Eligible Pro users will be gradually enrolled in the feature and will receive an in-editor notification when access is granted.
 
+![Auto-edit demo](https://p21.p4.n0.cdn.zight.com/items/4guL2xzb/6d545dab-e2db-4114-a05e-c54b08e7f0bd.jpg?v=a3673b4b48aed41b1977858f18ba0369)
+
+🔴 **Image to be uploaded to GCP** 🔴
+
 ### Auto-edit access for Enterprise customers
 
 **TBD -- waiting for Aravind to provide the details.**