Update UPGRADE.markdown

Fixing broken Markdown link

Author: Gipetto

UPGRADE.markdown

@@ -73,11 +73,11 @@ Now log in to your install and follow the upgrade instructions (which, really, c
 
 ## Rollback
 
-Should something go wrong you can roll back your install by reverting the folder names on your OpenVBX install and restoring the database from your backup. If this does happen then please open a ticket on (the Forums)[http://getsatisfaction.com/openvbx]. 
+Should something go wrong you can roll back your install by reverting the folder names on your OpenVBX install and restoring the database from your backup. If this does happen then please open a ticket on [the Forums](http://getsatisfaction.com/openvbx). 
 
 Be sure to include:
 
 1. Your hosting provider
 2. Your PHP version
 3. Your MySQL version
-4. Version of OpenVBX you are upgrading from and the version that you are upgrading to
+4. Version of OpenVBX you are upgrading from and the version that you are upgrading to