Land rapid7#5448, fix author name typo

Author: timwr

modules/exploits/windows/local/lenovo_systemupdate.rb

@@ -26,7 +26,7 @@ def initialize(info={})
       'License'         => MSF_LICENSE,
       'Author'          =>
         [
-          'Micahel Milvich', # vulnerability discovery, advisory
+          'Michael Milvich', # vulnerability discovery, advisory
           'Sofiane Talmat',  # vulnerability discovery, advisory
           'h0ng10'           # Metasploit module
         ],
@@ -119,7 +119,7 @@ def write_named_pipe(pipe, command)
   def get_security_token(lenovo_directory)
     unless client.railgun.get_dll('tvsutil')
       client.railgun.add_dll('tvsutil', "#{lenovo_directory}\\tvsutil.dll")
-      client.railgun.add_function('tvsutil', 'GetSystemInfoData', 'DWORD', [['PWCHAR', 'systeminfo', 'out']], windows_name = nil, calling_conv = 'cdecl')
+      client.railgun.add_function('tvsutil', 'GetSystemInfoData', 'DWORD', [['PWCHAR', 'systeminfo', 'out']], nil, 'cdecl')
     end
 
     dll_response = client.railgun.tvsutil.GetSystemInfoData(256)