fixing small sed typo

templates/WordPress_2_Instances_With_EBS_Volume.template

@@ -154,7 +154,7 @@
         "UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
           "#!/bin/bash -v\n",
           "sed --in-place --e s/database_name_here/", { "Ref" : "DBName" }, "/ --e s/username_here/", { "Ref" : "DBUsername" }, "/ --e s/password_here/", { "Ref" : "DBPassword" }, "/ --e s/DB_HOST/", "/ /usr/share/wordpress/wp-config.php\n",
-          "set --in-place --e \"s/DB_HOST\\s*',\\s*'localhost/DB_HOST', '", { "Ref": "WikiDatabaseIPAddress" },  "/\" /usr/share/wordpress/wp-config.php\n",
+          "sed --in-place --e \"s/DB_HOST\\s*',\\s*'localhost/DB_HOST', '", { "Ref": "WikiDatabaseIPAddress" },  "/\" /usr/share/wordpress/wp-config.php\n",
           "cp /usr/share/wordpress/wp-config.php /usr/share/wordpress/wp-config.orig\n"
         ]]}}
       }