Add comment explaining payload architecture restraints

modules/exploits/linux/http/ivanti_connect_secure_rce_cve_2024_37404.rb

@@ -44,7 +44,7 @@ def initialize(info = {})
         ],
         'DisclosureDate' => '2024-10-08',
         'Platform' => 'linux',
-        'Arch' => ARCH_X86,
+        'Arch' => ARCH_X86, # OpenSSL running on the appliance is an x86 binary which requires the payload to be ARCH_x86
         'Privileged' => true, # Administrative access is needed and code execution as root.
         'Targets' => [
           ['Automatic', {}]