Update send-and-sync.md #331

	name: CI
	on: [pull_request, merge_group, push]

	env:
	MDBOOK_VERSION: 0.4.40

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Setup Rust Toolchain
	uses: actions-rust-lang/setup-rust-toolchain@v1.9.0
	with:
	toolchain: nightly
	components: rust-docs
	- run: rustup default nightly

	- name: Install mdbook
	run: \|
	mkdir bin
	curl -sSL https://github.com/rust-lang/mdBook/releases/download/v${MDBOOK_VERSION}/mdbook-v${MDBOOK_VERSION}-x86_64-unknown-linux-gnu.tar.gz \| tar -xz --directory=bin
	echo "$(pwd)/bin" >> $GITHUB_PATH
	- name: Report versions
	run: \|
	rustup --version
	rustc -Vv
	mdbook --version
	- name: Run tests
	run: mdbook test

	# - name: Cache/Restore linkcheck
	# id: cache
	# uses: actions/cache@v4.0.2
	# with:
	# path: linkchecker
	# key: linkchecker-${{ runner.os }}

	# - name: Install linkcheck and Check links
	# # if: steps.cache.outputs.cache-hit != 'true'
	# run: \|
	# curl -sSLo linkcheck.sh \
	# https://raw.githubusercontent.com/rust-lang/rust/master/src/tools/linkchecker/linkcheck.sh
	# sh linkcheck.sh --all nomicon

	# - name: Check links
	# if: steps.cache.outputs.cache-hit == 'true'
	# run: \|
	# cd linkchecker
	# cargo run --release linkcheck

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