Add the proper Accelerometer and Gyro to the KHR3HV robot (cyberbotics#6959)

* Add the proper Accelerometer and Gyro to the KHR3HV robot
That match user expectation, and match the KHR2HV robot

* Fix formatting for KHR-3HV robot entry in changelog

---------

Co-authored-by: Yann LEROY <yann@desktop>
Co-authored-by: Olivier Michel <Olivier.Michel@cyberbotics.com>

Author: 3 people

docs/reference/changelog-r2025.md

@@ -2,6 +2,7 @@
 
 ## Webots R2025b
   - Enhancements
+    - Added proper `Accelerometer` and `Gyro` nodes for the KHR-3HV robot ([#6959](https://github.com/cyberbotics/webots/pull/6959)).
     - `WbCamera`, `WbContactProperties`, `WbMotor`, and `WbSkin` will now locally-download their resources if-necessary (like other nodes) when steaming or exporting to `w3d` ([#6856](https://github.com/cyberbotics/webots/pull/6856)).
     - Added implementations of `wbu_system_tmpdir` and `wbu_system_webots_instance_path` to the MATLAB API ([#6756](https://github.com/cyberbotics/webots/pull/6756)).
     - Added missing import libraries on Windows ([#6753](https://github.com/cyberbotics/webots/pull/6753)).

projects/robots/kondo/khr-3hv/protos/Khr3hv.proto

@@ -63,10 +63,10 @@ PROTO Khr3hv [
           creaseAngle 1
         }
       }
-      DEF KHR3HV_Accelerometer Pose {
+      DEF KHR3HV_Accelerometer Accelerometer {
         translation -0.0833 0.0345 0.0
       }
-      DEF KHR3HV_Gyro Pose {
+      DEF KHR3HV_Gyro Gyro {
         translation -0.0833 0.0345 -0.024
       }
       DEF KHR3HV_Head HingeJoint {