Updating documentation with a new download page url

Author: mdisec

documentation/modules/exploit/linux/http/alienvault_exec.md

@@ -13,7 +13,7 @@ This module was tested against AlienVault USM 5.2.5.
 **Vulnerable Application Installation Steps**
 
 Major version of older releases can be found at following URL.
-[http://downloads.alienvault.com/c/download](http://downloads.alienvault.com/c/download)
+[http://downloads.eu.alienvault.com/c/download](http://downloads.eu.alienvault.com/c/download)
 
 You can download file named as AlienVault-USM_trial_5.2.5.zip which contains a OVA file.
 In order to complete installation phase, you have to apply [https://www.alienvault.com/try-it-free](https://www.alienvault.com/try-it-free) .