Update instructions for installating from CDN

[soegaard]

On https://bossanova.uk/jspreadsheet/v4/ the installation instructions are:

// From a CDN
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/jspreadsheet-ce/dist/jspreadsheet.min.css" type="text/css" />
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/jspreadsheet-ce/dist/index.min.js"></script>

However this fails due to jsuites. I suggest adding

<script src="https://jsuites.net/v4/jsuites.js"></script>
<link rel="stylesheet" href="https://jsuites.net/v4/jsuites.css" type="text/css" />

to the from CDN installation instructions.