Fix branch name in workflow file #262

	name: Mike deploy

	on:
	push:
	branches: [ v0.13 ]

	jobs:
	build_docs:
	name: Generate [version] documentation
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [ 3.8 ]

	steps:
	- name: Checkout source files
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	submodules: recursive

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	architecture: x64
	cache: 'pip'
	cache-dependency-path: './requirements.txt'

	- name: Install Python dependencies
	run: python3 -m pip install -r ./requirements.txt

	- 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]"
	- name: Extract branch name
	shell: bash
	run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
	id: extract_branch

	- name: Deploy with mike
	run: \|
	mike deploy --push --update-aliases $(cat version.txt) latest

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