fix cosmosdb icon

docs-ref-conceptual/index.yml

@@ -64,7 +64,7 @@ sections:
       title: Connect to Azure Database for MySQL
       href: https://docs.microsoft.com/azure/mysql/connect-java
     - image:
-        src: https://docs.microsoft.com/azure/media/index/cosmosdb.svg
+        src: https://docs.microsoft.com/azure/media/index/CosmosDB_rgb_ui_lighttheme.svg
       title: Build a web app with Cosmos DB
       href: https://docs.microsoft.com/azure/cosmos-db/create-documentdb-java
     - image: