update version in doc:installation automatically #2

	name: Delete obsolete Documentation
	on:
	pull_request:
	types:
	- closed
	paths:
	- 'mkdocs.yml'
	- 'sootup.examples/**'
	- 'docs/**'

	permissions:
	contents: write

	jobs:
	delete:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	with:
	python-version: 3.x
	- run: pip install pkg_resources
	- run: pip install mike
	- run: git fetch origin gh-pages --depth=1
	- name: Configure git user
	run: \|
	git config --local user.email "github-actions[bot]@users.noreply.github.com"
	git config --local user.name "github-actions[bot]"
	- run: mike delete ${{ github.head_ref }} --push

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