Land #20336: opennms_horizon_authenticated_rce: Set Arch to ARCH_CMD

Author: bcoles

modules/exploits/linux/http/opennms_horizon_authenticated_rce.rb

@@ -40,7 +40,7 @@ module requires valid credentials for a user with
           ['CVE', '2023-0872'], # CVE for privilege escalation via ROLE_REST in OpenNMS Horizon before 32.0.2
         ],
         'Platform' => 'linux',
-        'Arch' => 'ARCH_CMD',
+        'Arch' => ARCH_CMD,
         'DefaultOptions' => {
           'PAYLOAD' => 'cmd/linux/http/x64/meterpreter/reverse_tcp',
           'RPORT' => 8980,