Fix a typo

Author: wchen-r7

modules/exploits/windows/local/bypassuac_eventvwr.rb

@@ -28,7 +28,7 @@ def initialize(info={})
       'Name'          => 'Windows Escalate UAC Protection Bypass (Via Eventvwr Registry Key)',
       'Description'   => %q{
         This module will bypass Windows UAC by hijacking a special key in the Registry under
-        the current user hive, and inserting a custom command that will get invokved when
+        the current user hive, and inserting a custom command that will get invoked when
         the Windows Event Viewer is launched. It will spawn a second shell that has the UAC
         flag turned off.