user guide: switch to wintersong theme #3

	name: Docs
	on:
	workflow_dispatch:
	push:
	branches:
	- main
	paths:
	- "user_guide/**"
	jobs:
	update:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.12
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	- name: Install dependencies
	run: \|
	python3.12 -m pip install -r user_guide/requirements.txt
	- name: MkDocs publish
	run: mkdocs gh-deploy --force
	working-directory: user_guide

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