change a figure number

TS-0041-oneM2M-SensorThings_interworking.md

@@ -164,7 +164,7 @@ The data in the SensorThings server are organized as according to  **Sensing Ent
 
 <figure>
   <img src="media/data_model.jpg" alt="data_model">
-  <figcaption>Figure 5-1 STA Sensing Entities Data Model <a href="#_ref_1">[1]</a></figcaption>
+  <figcaption>Figure 5-2 STA Sensing Entities Data Model <a href="#_ref_1">[1]</a></figcaption>
 </figure>
 
 In the Sensing Entities Data Model events or sensor data are called "observations". Before a sensor is able to push an observation to the server it needs at least a 'Thing' and a 'Datastream' entity. This has to be created beforehand. One 'Thing' might have different 'Sensors', one 'Location' or many 'HistoricalLocations'.