Migrate to in-toto v1 #59

	# this workflow runs the remote validate bake target from docker/docker.github.io
	# to check if yaml reference docs and markdown files used in this repo are still
	# valid: https://github.com/docker/docs/blob/98c7c9535063ae4cd2cd0a31478a21d16d2f07a3/docker-bake.hcl#L34-L36
	# path filters reflects the files that are used as remote resource in this
	# repo: https://github.com/docker/docs/blob/d5312d53e255a24e421dfe6c3344359e10271cb8/_config.yml#L202-L217
	name: docs-upstream

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	on:
	push:
	branches:
	- 'master'
	- 'v[0-9]*'
	paths:
	- '.github/workflows/docs-upstream.yml'
	- 'docs/buildkitd.toml.md'
	- 'docs/attestations/slsa-definitions.md'
	- 'docs/attestations/attestation-storage.md'
	- 'frontend/dockerfile/docs/reference.md'
	pull_request:
	paths:
	- '.github/workflows/docs-upstream.yml'
	- 'docs/buildkitd.toml.md'
	- 'docs/attestations/slsa-definitions.md'
	- 'docs/attestations/attestation-storage.md'
	- 'frontend/dockerfile/docs/reference.md'

	jobs:
	validate:
	uses: docker/docs/.github/workflows/validate-upstream.yml@main
	with:
	module-name: moby/buildkit

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