Fix grammar

Author: wchen-r7

modules/exploits/multi/misc/openoffice_document_macro.rb

@@ -23,7 +23,7 @@ def initialize(info={})
       'Name'           => "Apache OpenOffice Text Document Malicious Macro Execution",
       'Description'    => %q{
         This module generates an Apache OpenOffice Text Document with a malicious macro in it.
-        For exploit successfully, the targeted user must adjust the security level in Macro
+        To exploit successfully, the targeted user must adjust the security level in Macro
         Security to either Medium or Low. If set to Medium, a prompt is presented to the user
         to enable or disable the macro. If set to Low, the macro can automatically run without
         any warning.