how to make the player not rotate when i press left or right button ?

Did someone know how to make the player not rotate when i press left or right button ? I'm using unity script refrence for moving.

this video showing my problem: https://drive.google.com/file/d/1m-_Q3j0kt5bMfxiiqqjGAp0wtW7x8gno/view?usp=sharing

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Move : MonoBehaviour
 {
     private CharacterController controller;
     private Vector3 playerVelocity;
     private bool groundedPlayer;
     private float playerSpeed = 2.0f;
     private float jumpHeight = 1.0f;
     private float gravityValue = -9.81f;
 
     private void Start()
     {
         controller = gameObject.AddComponent<CharacterController>();
     }
 
     void Update()
     {
         groundedPlayer = controller.isGrounded;
         if (groundedPlayer && playerVelocity.y < 0)
         {
             playerVelocity.y = 0f;
         }
 
         Vector3 move = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
         controller.Move(move * Time.deltaTime * playerSpeed);
 
         if (move != Vector3.zero)
         {
             gameObject.transform.forward = move;
         }
 
         // Changes the height position of the player..
         if (Input.GetButtonDown("Jump") && groundedPlayer)
         {
             playerVelocity.y += Mathf.Sqrt(jumpHeight * -3.0f * gravityValue);
         }
 
         playerVelocity.y += gravityValue * Time.deltaTime;
         controller.Move(playerVelocity * Time.deltaTime);
     }
 }