refactor: updates CHANGELOG.md

Author: rickstaa

CHANGELOG.md

@@ -6,7 +6,8 @@
   - Add JointPosition and JointVelocity Interface
   - Fix: Robot now keeps position when no controller is running
   - joint_{position,velocity}_example controller are now available in `franka_gazebo`
-    
+  - Fix: franka_gazebo joint collision check bug
+
 
 ## 0.8.2 - 2022-02-22