CHANGES.md: update release notes

Author: moawnallah

CHANGES.md

@@ -80,6 +80,8 @@
   Beam now supports data enrichment capabilities using SQL databases, with built-in support for:
   - Managed PostgreSQL, MySQL, and Microsoft SQL Server instances on CloudSQL
   - Unmanaged SQL database instances not hosted on CloudSQL (e.g., self-hosted or on-premises databases)
+* Python examples added for CloudSQL enrichment handler on [Beam website](https://beam.apache.org/documentation/transforms/python/elementwise/enrichment-cloudsql/)
+  (Python) ([#35473](https://github.com/apache/beam/pull/35473)).
 
 ## Breaking Changes