modify contributing.md #3

	# name: publish-pypi
	# on:
	# push:
	# paths:
	# - 'stemflow/version.py'
	# tags:
	# - "v..."

	# jobs:
	# publish:
	# runs-on: ubuntu-latest
	# environment:
	# name: pypi
	# url: https://pypi.org/p/stemflow/
	# permissions:
	# id-token: write
	# steps:
	# - uses: actions/checkout@v4
	# - name: Python setup
	# uses: actions/setup-python@v5
	# with:
	# python-version: 3.9
	# cache: 'pip'
	# - name: Install package
	# run: \|
	# python -m pip install --upgrade pip
	# pip install wheel
	# pip install .
	# - name: Build package
	# run: \|
	# python setup.py sdist bdist_wheel
	# - name: Publish to PyPI
	# uses: pypa/gh-action-pypi-publish@release/v1
	# with:
	# user: __token__
	# password: ${{ secrets.PYPI_API_TOKEN }}
	# packages_dir: ./dist
	# # repository-url: https://pypi.org/p/stemflow/
	# verbose: true

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