Removed additional sign multiplication (#3088) (#3125)

(cherry picked from commit ef76b5b)

Co-authored-by: autome <rohit.bhor111.rb@gmail.com>

nav2_regulated_pure_pursuit_controller/src/regulated_pure_pursuit_controller.cpp

@@ -330,7 +330,7 @@ geometry_msgs::msg::TwistStamped RegulatedPurePursuitController::computeVelocity
       costAtPose(pose.pose.position.x, pose.pose.position.y), linear_vel, sign);
 
     // Apply curvature to angular velocity after constraining linear velocity
-    angular_vel = sign * linear_vel * curvature;
+    angular_vel = linear_vel * curvature;
   }
 
   // Collision checking on this velocity heading