How to limit the rotation speed of my player

Hey, i found a guide on google on how to rotate the player in the direction of the mouse and it works perfectly fine. But Iam trying to tweak things a little by limiting the speed my player can rotate to make it a bit more realistic. This is my Code im using right now void Update() {

         Plane plane = new Plane(Vector3.up, 0);
         float distance;
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 
         if (plane.Raycast(ray, out distance)) 
         {
             worldPosition = ray.GetPoint(distance); 
             Debug.Log(worldPosition);
             transform.LookAt(new Vector3(worldPosition.x, transform.position.y, worldPosition.z));
         }

got any suggestion for me? Thanks alot.