CI: use -q flag for linkcheck #116

	name: Build HTML pages and check links
	on:
	push:
	pull_request:
	schedule:
	- cron: "11 11 11 * *"
	jobs:
	linkcheck:
	runs-on: ubuntu-latest
	steps:
	- name: Clone repo
	uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- name: Install pandoc
	run: \|
	sudo apt-get install pandoc
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: 3.8
	- name: Install RTD requirements
	run: \|
	python -m pip install -r .readthedocs_requirements.txt
	- name: Build HTML
	run: \|
	python -m sphinx -W --keep-going --color -d _build/doctrees/ . _build/html/ -b html
	- name: Check links
	run: \|
	python -m sphinx -W --keep-going --color -d _build/doctrees/ . _build/linkcheck/ -b linkcheck -q
	- name: Upload results
	uses: actions/upload-artifact@v3
	if: ${{ success() \|\| failure() }}
	with:
	name: linkcheck
	path: _build/linkcheck/output.*

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