You should use a <a></a>
tag :
<a href="support.html">Get support</a>
If the only reason you want a <button></button>
tag is style, you can easily style <a></a>
tag
a {
display: inline-block;
text-decoration: none;
background-color: #eee;
border: 2px outset #ccc;
color: #000;
padding: 5px 8px;
margin: 5px;
}
If you absolutly want to use a <button></button>
tag you could do it using javascript like so :
<button onclick="document.location.href='support.html';">Get support</button>
Nevertheless, keep in mind that using a button is not proper code, they are not dedicated to links