add uefi entry

I managed this more or less by myself.

sudo pacman -S linux-lts linux-headers-lts

Installing the lts kernel will prompt for the headers, so you might as well do them together.

Then go to /boot and find the conf file, under loader or wherever. copy the file and append -lts to the linux img lines and vmlinuz-linux.

then sudo bootctl update, reboot, and you should have the new entry in the UEFI boot menu.


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