Example scripts: Fix typo in horz-distortion-contrib key (#96)

Author: khanasif786

client/python/example_user_scripts/sim_config/robot_quadrotor_px4_gimbal.jsonc

@@ -426,7 +426,7 @@
           "horz-noise-lines-contrib": 1.0,
           "horz-noise-lines-density-y": 0.01,
           "horz-noise-lines-density-xy": 0.5,
-          "horz-distortion-contirb": 1.0,
+          "horz-distortion-contrib": 1.0,
           "horz-distortion-strength": 0.002
         }
       ],
@@ -472,4 +472,4 @@
       "parent-link": "Frame"
     }
   ]
-}
+}