Use older runners #68

	name: Generate Docs

	on:
	push:
	branches:
	- 'docs'
	- 'master'
	- 'staging'

	jobs:
	docs:
	runs-on: ubuntu-latest

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

	- run: pip install mkdocs
	- run: cd _docs_src && ./make_docs.sh
	- run: git checkout gh-pages
	- run: if [ -d docs ]; then rm -r docs; fi
	- run: mv _docs docs

	- name: Commit site changes
	run: \|
	git config --global user.name github-actions
	git config --global user.email github-actions@github.com
	git add docs
	git commit -m "Update docs site"
	git push

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