Updated the Ackermann local planner parameters.

params/local_planner/ackermann_params.yaml

 base_local_planner: "AckermannPlannerROS"
 
 AckermannPlannerROS:
-  max_sim_time: 8.0
+  max_sim_time: 3.0
   min_sim_time: 1.0
   sim_granularity: 0.2
   angular_sim_granularity: 0.02
@@ -32,17 +32,17 @@ AckermannPlannerROS:
 
   max_trans_vel: 1.0
   min_trans_vel: 0.0
-  max_trans_acc: 0.3
+  max_trans_acc: 0.2
   max_steer_angle: 0.4
   min_steer_angle: -0.4
-  max_steer_vel: 0.5
-  min_steer_vel: -0.5
+  max_steer_vel: 0.3
+  min_steer_vel: -0.3
   max_steer_acc: 1.0
   axis_distance: 0.3662
   wheel_distance: 0.216
   wheel_radius: 0.05
 
-  cmd_vel_avg: 10
+  cmd_vel_avg: 1
   odom_avg: 1
 
   planner_patience: 5