add link to desktop files client 3.11 doc for upcoming release

Signed-off-by: Matthieu Gallien <matthieu.gallien@nextcloud.com>

index.html

@@ -273,6 +273,14 @@ <h1>Nextcloud Desktop Client<a class="headerlink" href="#desktop" title="Permali
 								<p>Once you have a Nextcloud Server running, you can connect to it with various <a class="reference external" href="https://nextcloud.com/install/#install-clients">clients like our mobile and desktop client.</a>
 								Find documentation for the desktop client below.</p>
 
+								<div class="section" id="desktop-311">
+									<h2>Desktop 3.11<a class="headerlink" href="#desktop-311" title="Permalink to this headline">¶</a></h2>
+									<p>This documents the <em>upcoming</em> version of the Nextcloud desktop client (not released).</p>
+									<ul class="simple">
+										<li><a class="reference external" href="https://docs.nextcloud.com/desktop/3.11">Manual</a>
+									</ul>
+								</div>
+
 								<div class="section" id="desktop-310">
 									<h2>Desktop 3.10<a class="headerlink" href="#desktop-310" title="Permalink to this headline">¶</a></h2>
 									<p>This documents the <em>latest</em> version of the Nextcloud desktop client.</p>