Change Camera Position

Hello to everyone.I try to build a 2D game and i have a problem with the camera.Now the camera follows the player and when the player is up(jump) camera follows him and i don't want this.I want from the camera to be in center and follow the player and when the player jump to remain in center.How to do that?Please help me.I know little about coding.Sorry for my english.Thank you very much

My code is this:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Camerafollow2DPlatformer : MonoBehaviour {
 
     public Transform target;
     public float smoothing;
 
     Vector3 offset;
     float lowY;
 
     // Use this for initialization
     void Start () {
         offset = transform.position - target.position;
         lowY = transform.position.y;
     }
     
     // Update is called once per frame
     void FixedUpdate () {
         Vector3 targetCamPos = target.position + offset;
         transform.position = Vector3.Lerp (transform.position, targetCamPos, smoothing * Time.deltaTime);
         if (transform.position.y < lowY) transform.position = new Vector3 (transform.position.x, lowY, transform.position.z);
     }
 }