Adjust headings

Author: dominicbetts

articles/iot/tutorial-iot-industrial-solution-architecture.md

@@ -94,7 +94,7 @@ The station OPC UA server uses the following OPC UA node IDs for telemetry to th
 - i=418 - actual cycle time
 - i=434 - pressure
 
-### Digital feedback loop with UA Cloud Commander and UA Cloud Action
+## Digital feedback loop with UA Cloud Commander and UA Cloud Action
 
 The solution uses a digital feedback loop to manage the pressure in a simulated station. To implement the feedback loop, the solution triggers a command from the cloud on one of the OPC UA servers in the simulation. The trigger activates when simulated time-series pressure data reaches a certain threshold. You can see the pressure of the assembly machine in the Azure Data Explorer dashboard. The pressure is released at regular intervals for the Seattle production line.