Update Ring Website - marketing/website/download.html
<tr>
- <th>Ring 1.12 Documentation (HTML)</th>
+ <th>Ring 1.15 Documentation (HTML)</th>
<th><a href="https://sourceforge.net/projects/ring-lang/files/Ring%201.15/Fayed_RingDoc_1.15.zip/download" target="_blank">Download (54 MB)</a></th>
