simnet (#435)

Co-authored-by: Daan Hoogland <dahn@apache.org>

Author: DaanHoogland

src/pages/users.mdx

@@ -68,6 +68,7 @@ mailing list <b>users@cloudstack.apache.org</b>.
 - [Server24](https://www.server24.eu)
 - [Serverion](http://www.serverion.com)
 - [Severalnines](https://severalnines.com)
+- [Simnet](https://simnet.ca/)
 - [Telia Latvia](http://www.telia.lv)
 - [Tranquil Hosting](http://www.tqhosting.com)
 - [Treestle BV](http://www.liquidns.com)