fix deployment error #4

	name: Publish docs via GitHub Pages

	on:
	push:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Fetch Submodule Branches
	run: \|
	git submodule foreach --recursive 'git fetch --all'
	git submodule update --init --remote --recursive
	git submodule foreach --recursive 'git fetch origin +refs/heads/:refs/remotes/origin/'

	- name: Deploy docs
	uses: mhausenblas/mkdocs-deploy-gh-pages@master
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	# Uncomment the following line if using PERSONAL_TOKEN
	# PERSONAL_TOKEN: ${{ secrets.PERSONAL_TOKEN }}
	# Uncomment and modify if using a custom domain
	# CUSTOM_DOMAIN: optionaldomain.com
	# Uncomment and modify if your mkdocs.yml is not in the root directory
	# CONFIG_FILE: folder/mkdocs.yml
	# Uncomment and modify if you need to install extra packages
	# EXTRA_PACKAGES: build-base
	# Uncomment and modify if using GitHub Enterprise
	# GITHUB_DOMAIN: github.myenterprise.com
	# Uncomment and modify if you have a requirements.txt file for MkDocs plugins
	REQUIREMENTS: requirements.txt

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