fix x64 typo

Author: zerosum0x0

lib/msf/core/exploit/smb/client/psexec_ms17_010.rb

@@ -617,7 +617,7 @@ def exploit_fish_barrel(pipe_handle)
       # this case is only for Windows 2003
       # try offset of 64 bit then 32 bit because no target architecture
       attempt_list.push(OS_ARCH_INFO[@ctx['os']]['x86'])
-      attempt_list.push(OS_ARCH_INFO[@ctx['os']]['64'])
+      attempt_list.push(OS_ARCH_INFO[@ctx['os']]['x64'])
     end
 
     # ================================