Add a link to the Gitlab on the Projects page of the site.

templates/projects.tpl

 <h3>Projects currently hosted by SUCS</h3>
+
+<p>SUCS has recently deployed <a href="https://projects.sucs.org/explore">Gitlab</a> with a more expansive list of projects.</p>
+
 <dl>
 {foreach name=projects from=$projects item=project}
 <dt><a href="http://projects.sucs.org/projects/{$project.filename}">{$project.name}</a></dt>
 {if $project.descr}<dd>{$project.descr}{/if}</dd>
 {/foreach}
-</dl>
+</dl>
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