Update link in readme to add images/videos (#611)

- https://sourcegraph.slack.com/archives/C01DXLN3D0T/p1725037409559779

Author: MaedahBatool

README.md

@@ -136,7 +136,7 @@ For example, if you want to link to the Cody Quickstart somewhere in the Code Se
 
 ### Adding images and binary assets
 
-For large images and other binary assets, upload them to the `sourcegraph-assets` Google Cloud Storage bucket instead with `gsutil cp -a public-read local/path/to/myasset.png gs://sourcegraph-assets/` (and refer to them as `https://sourcegraphstatic.com/myasset.png`). For a more detailed instructions visit [this page](https://handbook.sourcegraph.com/handbook/editing/handbook-images-video/).
+For large images and other binary assets, upload them to the `sourcegraph-assets` Google Cloud Storage bucket instead with `gsutil cp -a public-read local/path/to/myasset.png gs://sourcegraph-assets/` (and refer to them as `https://sourcegraphstatic.com/myasset.png`). For a more detailed instructions visit [this page](https://www.notion.so/sourcegraph/How-to-host-blog-assets-using-GCP-file-storage-899140058fe94ab4b1d39324d10caca5).
 
 > Note: Make sure to use [ImageOptim.app](https://imageoptim.com/mac) to reduce the size of the images before uploading, since large images degrade page loading speed.