Bump CI python version to 3.9 #995

	name: "Check docs and links"
	on:
	- pull_request
	- push

	jobs:
	docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/[email protected]
	with:
	python-version: 3.9

	- name: "Install prerequisites"
	run: \|
	pip3 install -r docs/requirements.txt

	- uses: ammaraskar/sphinx-action@master
	with:
	docs-folder: "docs/"
	pre-build-command: \|
	sphinx-apidoc -f grafanalib -o docs/api
	python setup.py install --user
	build-command: "make html"

	- name: Link Checker
	id: lc
	uses: lycheeverse/[email protected]
	with:
	args: --verbose */.html
	- name: Fail if there were link errors
	run: exit ${{ steps.lc.outputs.exit_code }}

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