Please chmod +x coreboot_util.sh in the repository
Background
I modified the install instructions for me as I find it much more convenient and cleaner to clone a (tiny) git repo like this one (having the benefiti it is easily updatable) than doing some wget/curl request for a shell file.
So you do:
git clone https://source.puri.sm/firmware/utility.git
cd utility
chmod +x coreboot_util.sh
./coreboot_util.sh
Proposal
Now the chmod +x coreboot_util.sh
step is a little unnecessary. Because git can store such execution information in the repository.
So could you – for more convenience – just do that?
I would have done a MR myself, but I am not allowed to fork repos here so…