Improve `board_s3()` docs for non-AWS S3-compatible storage #197

	# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
	# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
	on:
	push:
	branches: [main, master]
	pull_request:
	branches: [main, master]

	name: cross-compat

	jobs:
	cross-compat:
	runs-on: ubuntu-latest
	env:
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
	SHARED_BOARD: "tmp"

	steps:
	- uses: actions/checkout@v3

	- uses: r-lib/actions/setup-r@v2
	with:
	use-public-rspm: true

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

	- uses: r-lib/actions/setup-r-dependencies@v2
	with:
	extra-packages: local::.

	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install --upgrade git+https://github.com/rstudio/pins-python

	- name: Write pins
	run: \|
	python .github/cross-compat/write-pins.py $SHARED_BOARD
	Rscript .github/cross-compat/write-pins.R $SHARED_BOARD

	- name: Read pins
	run: \|
	Rscript .github/cross-compat/read-pins.R $SHARED_BOARD
	python .github/cross-compat/read-pins.py $SHARED_BOARD

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