Update `make docs` procedure #79

	name: Update `make docs` procedure
	on:
	schedule:
	- cron: '0 7 * * 1-5'
	jobs:
	main:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Update procedure
	if: github.repository != 'grafana/writers-toolkit'
	run: \|
	curl -s -Lo docs/docs.mk https://raw.githubusercontent.com/grafana/writers-toolkit/main/docs/docs.mk
	curl -s -Lo docs/make-docs https://raw.githubusercontent.com/grafana/writers-toolkit/main/docs/make-docs
	if git diff --exit-code; then exit 0; fi
	BRANCH="$(date +%Y-%m-%d)/update-make-docs"
	git checkout -b "${BRANCH}"
	git add .
	git config --local user.email "[email protected]"
	git config --local user.name "grafanabot"
	git commit -m "Update \`make docs\` procedure"
	git push -v origin "refs/heads/${BRANCH}"
	gh pr create --fill
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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