Add notebooks update to CHANGELOG for release 3.64.0 (#1449)

Author: vbrodsky

CHANGELOG.md

@@ -7,6 +7,11 @@
 ## Removed
 * Review related WebhookDataSource topics
 
+## Notebooks
+* Added get_catalog notebook
+* Update custom metrics notebook
+* Update notebooks for video and image annotation import
+
 # Version 3.63.0 (2024-02-19)
 ## Added
 * Ability for users to install and use sdk with pydantic v.2.* while still maintaining support for pydantic v1.*