Updating the recovery partition via USB installer
Just updating 10.10 to 10.10.1 with the delta update via apple's software update website, or the mac app store will not update the yosemite recovery partition.
But if you make a bootable usb installer for 10.10.1 with the full installer from the mac app store, you can use it to update the recovery partition too. Just run it over 10.10 or even 10.10.1 if you already have it installed, and the recovery partition will be updated to a 10.10.1 version.
Just beware that if you previously reverted a core storage logical volume created by a previous yosemite installer, this method will convert it back to core storage, so another revert will be necessary if you want to be able to edit your partitions again.
So here is the reverting method again if you deem it necessary:
Run these 2 commands in terminal.
diskutil cs list
and then
diskutil coreStorage revert lvUUID
where lvUUID is the last lvUUID reported by the previous Terminal command.
Then restart for everything to get back to normal after you have run these commands in Terminal.