Add note about approval for non-WebSocket communication

Author: Bluenix2

pydis_site/templates/events/pages/code-jams/9/rules.html

@@ -20,6 +20,8 @@
             For example, you may use PostgreSQL as a database but not its `NOTIFY` command.
             Working with subprocesses (through stdin/stdout or <code>multiprocessing.Pool()</code>/<code>concurrent.futures.ProcessPoolExecutor()</code>) is also allowed.
         </p>
+
+        <p>If you're interested in utilizing a particular non-WebSocket method of communication, reach out to the Events Team for discussion and approval</p>
     </li>
     <li><p>Your solution should be platform agnostic. For example, if you use filepaths in your submission, use <code>pathlib</code> to create platform agnostic Path objects instead of hardcoding the paths.</p></li>
     <li>