Add warning to not contact individual team members directly

and instead use the offical devroom manager address!

Author: atodorov

index.html

@@ -123,6 +123,12 @@ <h1>
 
 <p>Please note: FOSDEM is a <a href="https://en.wikipedia.org/wiki/Free_and_open-source_software">FLOSS</a> community event, by and for the community, please ensure your topic is appropriate (i.e. this isn't the right forum for commercial product presentations)</p>
 
+<p>
+    <strong>WARNING:</strong>
+    DO NOT EMAIL individual team members directly. Send your inquiries to <em>testing-devroom-manager [at] fosdem.org</em> or
+    contact us via the official FOSDEM Matrix chat!
+</p>
+
 <h1>
 <a name="who" class="anchor" href="#who"><span class="octicon octicon-link"></span></a>Who</h1>