changed art file type

Author: HeidiSteen

articles/search/knowledge-store-concept-intro.md

@@ -22,7 +22,7 @@ If you have used AI skills with Azure Search in the past, you already know that
 
 Physically, a knowledge store is [Azure Storage](https://docs.microsoft.com/azure/storage/common/storage-account-overview), either Azure Table storage, Azure Blob storage, or both. Any tool or process that can connect to Azure Storage can consume the contents of a knowledge store.
 
-![Knowledge store in pipeline diagram](./media/knowledge-store-concept-intro/knowledge-store-concept-intro.png "Knowledge store in pipeline diagram")
+![Knowledge store in pipeline diagram](./media/knowledge-store-concept-intro/knowledge-store-concept-intro.svg "Knowledge store in pipeline diagram")
 
 Projections are your mechanism for structuring data in a knowledge store. For example, through projections, you can choose whether output is saved as a single blob or a collection of related tables.