Double Jumping in Unity - Fix Infinite Jumping

[SerializeField] int maxJumps = 2;

[Header("Ground Check")] [SerializeField]
LayerMask groundMask;

[SerializeField] float groundCheckSize = 0.5f;

int _jumpCount = 0;

bool IsGrounded
{
  get
  {
    var hit = Physics2D.Raycast(
      transform.position,
      Vector2.down,
      groundCheckSize,
      groundMask);
    
    if (!hit || !hit.collider)
    {
      return false;
    }
    
    _jumpCount = 0;
    return true;
  }
}

if (Input.GetKeyDown(KeyCode.Space)
  && (IsGrounded || _jumpCount < maxJumps))
{
    rigidbody2d.angularVelocity = 0;
    rigidbody2d.linearVelocityY = 0;

    _jumpCount++;
    rigidbody2d.linearVelocityY = jumpPower;
}

void OnDrawGizmos()
{
    Gizmos.DrawRay(transform.position, Vector3.down * groundCheckSize);
}