Update whats-new-archive.md

Author: jonburchel

articles/data-factory/whats-new-archive.md

@@ -21,6 +21,12 @@ This archive page retains updates from older months.
 
 Check out our [What's New video archive](https://www.youtube.com/playlist?list=PLt4mCx89QIGS1rQlNt2-7iuHHAKSomVLv) for all of our monthly updates.
 
+## September 2023
+
+### Pipelines
+
+Added support for metadata driven pipelines for dynamic full and incremental processing in Azure SQL [Learn more](https://techcommunity.microsoft.com/t5/azure-data-factory-blog/metadata-driven-pipelines-for-dynamic-full-and-incremental/ba-p/3925362)
+
 ## August 2023
 
 ### Change Data Capture