fix the gray-colored font in dark mode #92

	name: Docs
	on: [push, pull_request, workflow_dispatch]
	jobs:
	docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	- name: Install dependencies
	run: \|
	pip install pygments==2.14.0
	pip install sphinx==4.4.0
	pip install sphinx_rtd_theme==1.1.1
	pip install sphinx-tabs==3.4.0
	pip install sphinx-notfound-page==0.8.3
	pip install sphinxext-opengraph==0.7.5

	- name: Sphinx build
	run: \|
	cd doc
	make html
	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
	with:
	publish_branch: gh-pages
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./doc/build/html/
	force_orphan: true

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