Update main.yml to use actions/cache@4 (@1 deprecated) (#552) #1082

	---
	name: Release
	on: push
	jobs:
	pypi:
	name: Build and publish to PyPI
	if: startsWith(github.event.ref, 'refs/tags')
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.13'
	- name: Install "build" package
	run: \|
	python -m pip install build
	- name: Build sdist and wheel
	run: \|
	python -m build
	- name: Publish package to PyPI
	uses: pypa/[email protected]
	with:
	user: __token__
	password: ${{ secrets.PYPI_TOKEN }}

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