[REFACTOR] Centralize handling of Python version #433

	# -- mode: yaml; --
	# Time-stamp: <Tue 2022-08-30 14:58 svarrette>
	################################################################################
	# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
	#
	name: Test Build ULHPC Technical Documention
	on: [push, pull_request]
	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Read Python version
	id: pyversion
	run: echo "PYTHON_VERSION=$(cat .python-version)" >> $GITHUB_ENV
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'
	cache: 'pip'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	mkdocs --version
	- name: build ULHPC documentation
	run: mkdocs build
	# run: mkdocs build --strict

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