Update paper.md

Author: Dheeraj791

paper.md

@@ -89,6 +89,7 @@ from muscle activity associated with fasciculations. It was designed to operate
 on a range of skeletal muscles and to be resistant to variations in ultrasound
 probe orientation, an important factor in clinical workflows.
 
+![High-level architecture](figures/hl_architecture.png)
 
 ```
 Figure 1: High-level Architecture
@@ -128,4 +129,4 @@ This work was supported by financial assistance through Manchester Metropoli-
 tan University’s (MMU) scholarships in Life Sciences.
 
 
-## References
+## References