Fix comment in upgrade.conf

Author: Kristan Kenney

install/upgrade/upgrade.conf

@@ -36,7 +36,7 @@ UPGRADE_UPDATE_RAINLOOP='true'
 
 # Update the File Manager or it's configuration file
 # UPGRADE_UPDATE_FILEMANAGER: Performs an upgrade/repair install of the File Manager
-# UPGRADE_UPDATE_FILEMANAGER: Updates only the configuration file
+# UPGRADE_UPDATE_FILEMANAGER_CONFIG: Updates only the configuration file
 UPGRADE_UPDATE_FILEMANAGER='true'
 UPGRADE_UPDATE_FILEMANAGER_CONFIG='false'