How do I patch ESXi 5?

I noticed the first patch to ESXi 5 was just released, but there is no infrastructure update, Host Update Utility, etc... included with the new VMWare client.  How does one go about patching a ESXi 5?

It seems like it would be a very obvious and common question, but I searched the forums and documentation and couldn't find anything specific to patching ESXi 5.

Thanks so much,

~Bill