Documentation is misleading on LFS

[cupcakearmy]

The docs say:

checkout/README.md

Lines 81 to 83 in bf08527

	# Whether to download Git-LFS files
	# Default: false
	lfs: ''

However setting lfs: true does not download the actual files, only installs git lfs. We still need to run git lfs checkout. This is quite counter intuitive.

I think that the docs should hint that lfs does not actually checkout the files.

[cupcakearmy]

My mistake, it actually does everything it should.

docker/build-push-action#312

I was wondering why lfs items did not end up in the docker image, but turns out thats an issue there and not here 🤦‍♂️