Fix "join" link to remove iot reference

Signed-off-by: BJ Hargrave <hargrave@us.ibm.com>

layouts/shortcodes/home-members.html

@@ -2,7 +2,7 @@
   <div class="featured-members-list"></div>
   <p></p>
   <ul class="list-inline">
-    <li><a class="btn btn-primary" href="https://accounts.eclipse.org/contact/membership/iot">Become a Member</a></li>
+    <li><a class="btn btn-primary" href="https://accounts.eclipse.org/contact/membership/osgi">Become a Member</a></li>
     <li><a class="btn btn-primary" href="/membership/members/">View all members</a></li>
   </ul>
 </div>
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