Fix docs build with python 3.12 and pin the python version in the gh workflows. #189

	name: Pull Request Build

	on:
	pull_request:
	branches: [master]
	types: [opened, synchronize, reopened]

	concurrency:
	group: pr-build-${{ github.ref }}
	cancel-in-progress: false

	jobs:
	preview:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout PR
	uses: actions/checkout@v2

	- name: Install Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.12

	- name: Setup Python
	run: \|
	python -m venv ./venv --clear
	source ./venv/bin/activate
	pip install -r ./requirements.txt

	- name: Build docs
	run: \|
	source ./venv/bin/activate
	./build.sh
	test -f ./docs/index.html # sanity check

	- name: Save PR Number
	run: echo ${{ github.event.number }} > ./docs/pr-number.txt

	- name: Upload artifact
	uses: actions/upload-artifact@v2
	if: success()
	with:
	name: site
	path: ./docs/
	if-no-files-found: error

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