Update future-proofing.md | Fixed a typo #61

	name: Publish

	on:
	push:
	pull_request:

	jobs:
	publish:
	name: GitHub Pages
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Get mdBook
	run: \|
	export MDBOOK_VERSION="v0.4.5"
	export MDBOOK_TARBALL="mdbook-${MDBOOK_VERSION}-x86_64-unknown-linux-gnu.tar.gz"
	export MDBOOK_URL="https://github.com/rust-lang/mdBook/releases/download/${MDBOOK_VERSION}/${MDBOOK_TARBALL}"
	curl -Lf "${MDBOOK_URL}" \| tar -xz

	- name: Build
	run: ./mdbook build

	- name: Push to gh-pages
	if: ${{github.ref == 'refs/heads/master'}}
	working-directory: book
	run: \|
	REV=$(git rev-parse --short HEAD)
	git init
	git remote add upstream https://x-access-token:${{secrets.GITHUB_TOKEN}}@github.com/rust-lang/api-guidelines
	git config user.name "Rust API Guidelines"
	git config user.email "libs@rust-lang.org"
	git add -A .
	git commit -qm "API Guidelines @ ${{github.repository}}@${REV}"
	git push -q upstream HEAD:refs/heads/gh-pages --force

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