Broken link fixed

Author: pritamso

articles/iot-develop/TOC.yml

@@ -204,7 +204,7 @@
     - name: Azure Roadmap
       href: https://azure.microsoft.com/roadmap/?category=iot
     - name: Azure IoT Tools
-      href: https://marketplace.visualstudio.com/items?itemName=vsciot-vscode.azure-iot-tools
+      href: https://marketplace.visualstudio.com/items?itemName=vsciot-vscode.azure-iot-toolkit
     - name: Azure IoT Explorer tool
       href: https://github.com/Azure/azure-iot-explorer
     - name: iothub-diagnostics tool