Fix connector name in TOC

Author: linda33wj

articles/data-factory/TOC.yml

@@ -180,7 +180,7 @@
       href: connector-azure-blob-storage.md
     - name: Azure Cosmos DB SQL API
       href: connector-azure-cosmos-db.md
-    - name: Azure Cosmos DB MongDB API
+    - name: Azure Cosmos DB's API for MongoDB
       href: connector-azure-cosmos-db-mongodb-api.md
     - name: Azure Data Explorer
       href: connector-azure-data-explorer.md