Python: Only install `pdoc` for Python 3.9+ #1703

	name: cargo-vet
	on:
	pull_request:
	push:
	branches:
	main
	jobs:
	cargo-vet:
	name: Vet Dependencies
	runs-on: ubuntu-latest
	env:
	CARGO_VET_VERSION: 0.10.0
	steps:
	- uses: actions/checkout@master
	- name: Install Rust
	run: rustup update stable && rustup default stable
	- uses: actions/cache@v2
	with:
	path: ${{ runner.tool_cache }}/cargo-vet
	key: cargo-vet-bin-${{ env.CARGO_VET_VERSION }}
	- name: Add the tool cache directory to the search path
	run: echo "${{ runner.tool_cache }}/cargo-vet/bin" >> $GITHUB_PATH
	- name: Ensure that the tool cache is populated with the cargo-vet binary
	run: \|
	export CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
	cargo install --root ${{ runner.tool_cache }}/cargo-vet --version ${{ env.CARGO_VET_VERSION }} cargo-vet
	- name: Invoke cargo-vet
	run: cargo vet --locked

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