[Maintenance] fix path to requirements.txt in deploy_docs workflow #658

	# As much as possible, this file should be kept in sync with
	# https://github.com/napari/napari/blob/main/.github/workflows/build_docs.yml
	name: Build PR Docs

	on:
	pull_request:
	branches:
	- main
	workflow_dispatch:

	jobs:
	build-and-upload:
	name: Build & Upload Artifact
	runs-on: ubuntu-latest
	steps:
	- name: Clone docs repo
	uses: actions/checkout@v3

	- name: Clone main repo
	uses: actions/checkout@v3
	with:
	path: napari # place in a named directory
	repository: napari/napari
	# ensure version metadata is proper
	fetch-depth: 0

	- name: Copy examples to docs folder
	run: \|
	cp -R napari/examples .

	- uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- uses: tlambert03/setup-qt-libs@v1

	- name: Install Dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install "napari/[all]" -c "napari/resources/constraints/constraints_py3.10_docs.txt"
	python -m pip install -r requirements.txt -c "napari/resources/constraints/constraints_py3.10_docs.txt"

	- name: Testing
	run: \|
	python -c 'import napari; print(napari.__version__)'
	python -c 'import napari.layers; print(napari.layers.__doc__)'

	- name: Build Docs
	uses: aganders3/headless-gui@v1
	env:
	GOOGLE_CALENDAR_ID: ${{ secrets.GOOGLE_CALENDAR_ID }}
	GOOGLE_CALENDAR_API_KEY: ${{ secrets.GOOGLE_CALENDAR_API_KEY }}
	with:
	run: make docs GALLERY_PATH=../examples/

	- name: Upload artifact
	uses: actions/upload-artifact@v3
	with:
	name: docs
	path: docs/_build

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