Add missing upper bound for mtl package #153

	# Simple workflow for deploying static content to GitHub Pages
	name: Docs

	on:
	# Runs on pushes targeting the default branch
	push:
	branches: [master]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Allow one concurrent deployment
	concurrency:
	group: "pages"
	cancel-in-progress: true

	jobs:
	# Single deploy job since we're just deploying
	deploy:
	strategy:
	matrix:
	python-version: ["3.10.8"]

	env:
	DOCS_DIR: docs
	DOCS_BUILD_DIR: docs/build
	DOCS_BUILD_HTML_DIR: docs/build/html

	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	pip install -r ${{ env.DOCS_DIR }}/requirements.txt
	- name: Build User Manual in HTML
	run: \|
	cd ${{ env.DOCS_DIR }}
	make html
	- name: Deploy to GitHub Pages
	uses: peaceiris/actions-gh-pages@v3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ${{ env.DOCS_BUILD_HTML_DIR }}

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