Autotune: Update image in README.md

Author: mahima-yoga

autotune/README.md

@@ -77,12 +77,11 @@ Using default PX4 gains. Perform these maneuvers separately for each axis: roll,
 
 #### Model Verification
 
-1. Check that the estimated dynamic model correctly tracks the actual aircraft output (a).
-2. If not, adjust the system order (number of poles and zeros) and/or delay parameters (b).
-3. Verify that the system is minimum-phase (i.e., zeroes lie inside the unit circle) (c).
+1. Check that the estimated dynamic model correctly tracks the actual aircraft output.
+2. If not, adjust the system order (number of poles and zeros) and/or delay parameters.
+3. Verify that the system is minimum-phase (i.e., zeroes lie inside the unit circle).
 
-TODO: update this image to include numbers and make the boxes the same colour
-![image](https://github.com/user-attachments/assets/1172f4a1-7d76-4ef5-8ad9-b0eb05b85a35)
+![image](https://github.com/user-attachments/assets/87168b77-1b52-4d6f-bb4d-ace3f76fe4ee)
 
 #### Tuning Gains