Merge pull request #224426 from varun-dhawan/varun-azure-docs-pr

[Azure-PG-Flex] - updates the release notes with the new announcements

Author: prmerger-automator[bot]

articles/postgresql/flexible-server/release-notes.md

@@ -23,6 +23,7 @@ This page provides latest news and updates regarding feature additions, engine v
 
 ## Release: November 2022
 
+* Public preview of [Enhanced Metrics](./concepts-monitoring.md) for Azure Database for PostgreSQL – Flexible Server
 * Support for [minor versions](./concepts-supported-versions.md) 14.5, 13.8, 12.12, 11.17. <sup>$</sup>
 * General availability of Azure Database for PostgreSQL - Flexible Server in China North 3 & China East 3 Regions.