Don't publish docs from beta git tag

[kylebarron]

Not sure why this isn't working:

obstore/.github/workflows/docs.yml

Lines 53 to 66 in 5f50fda

	run: |
	# Get most recent git tag
	# https://stackoverflow.com/a/7261049
	# https://stackoverflow.com/a/3867811
	# We don't use {{github.ref_name}} because if triggered manually, it
	# will be a branch name instead of a tag version.
	# Then remove `py-` from the tag
	VERSION=$(git describe --tags --match="py-*" --abbrev=0 | cut -c 4-)
	# Only push docs if no letters in git tag after the first character
	# (usually the git tag will have v as the first character)
	if echo $VERSION | cut -c 1- | grep -q "[A-Za-z]"; then
	uv run mike deploy $VERSION latest --update-aliases --push
	fi

[kylebarron]

This still doesn't work correctly.