Explain the deprecation of the MongoDB plugin (#83)

Update this documentation because it is used to create the
documentation on plugins.jenkins.io

Author: MarkEWaite

content/JENKINS/MongoDB-Plugin.html

@@ -59,6 +59,19 @@ <h1 id="title-heading" class="pagetitle">
 
 </div></div>
 
+<h3>Deprecated</h3>
+
+The plugin has been deprecated because it can no longer perform its primary function of downloading and installing MongoDB for a freestyle job.
+
+MongoDB does not allow the Jenkins tool installer list generator to list their available community editions.  It has been disallowed since at least November, 2022.
+
+Since we can't list their available community editions from our list generator, that tool installer data will always be empty.
+That blocks the primary use case of the plugin
+
+The plugin also has a <a href="https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1904">known security vulnerability</a>.
+
+As noted in <a href="https://issues.jenkins.io/browse/JENKINS-76359">JENKINS-76359</a>, the MongoDB tool installer file has been empty since November 29, 2022.
+The primary function of the MongoDB plugin is to provide an installer for MongoDB that can be used from a freestyle project, but the empty tool installer file means that function has not been provided for over 3 years.
 
 <p>This plugin provides <a href="http://www.mongodb.org/" class="external-link" rel="nofollow">MongoDB</a> integration capabilities.</p>