Added lightbox coding for pnp-architecture.svg

Author: DENKEN02MSFT

articles/iot/concepts-architecture.md

@@ -22,7 +22,7 @@ Every model and interface has a unique ID.
 
 The following diagram shows the key elements of an IoT Plug and Play solution:
 
-:::image type="content" source="media/concepts-architecture/pnp-architecture.svg" alt-text="Diagram that shows the key elements of the IoT Plug and Play architecture." border="false":::
+:::image type="content" source="media/concepts-architecture/pnp-architecture.svg" alt-text="Diagram that shows the key elements of the IoT Plug and Play architecture." border="false" lightbox="media/concepts-architecture/pnp-architecture.svg":::
 
 ## Model repository