Correct spelling

Author: Meatballs1

modules/exploits/windows/local/virtual_box_guest_additions.rb

@@ -151,7 +151,7 @@ def exploit
     hal_dispatch_table = find_haldispatchtable
     if hal_dispatch_table.nil?
       session.railgun.kernel32.CloseHandle(handle)
-      fail_with(Failure::Unknown, "Filed to disclose HalDispatchTable")
+      fail_with(Failure::Unknown, "Failed to disclose HalDispatchTable")
     else
       print_good("Address successfully disclosed.")
     end