How to change the spacing between Bootstrap buttons?

Question

Bootstrap

How can I change the distance that I marked in the picture? Should it be reduced or eliminated altogether? I attached a piece of code, otherwise it hurts a lot

<li class="list-group-item rounded-0">
    <div class="row">
        <div class="col-2 pr-1">
            <h1 class="display-4 m-0" style="font-size: 1.2vw; font-family: 'Poppins', sans-serif;">{{$allUser->id}} </h1>
        </div>

Answer 1

Margin :
htmlbook.ru/css/margin
or do you want to make their height bigger? then
htmlbook.ru/css/padding