Restore mermaid flowchart support #1083

	name: Code Format

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:

	pre-commit-check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2

	- name: set PY
	run: echo "PY=$(python -VV \| sha256sum \| cut -d' ' -f1)" >> $GITHUB_ENV
	- uses: actions/cache@v2
	with:
	path: ~/.cache/pre-commit
	key: pre-commit\|${{ env.PY }}\|${{ hashFiles('.pre-commit-config.yaml') }}

	- uses: pre-commit/[email protected]
	# this action also provides an additional behaviour when used in private repositories
	# when configured with a github token, the action will push back fixes to the pull request branch
	# with:
	# token: ${{ secrets.GITHUB_TOKEN }}

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