fix: typo in hints (#443) #260

	name: Book Deployment
	on:
	push:
	branches:
	- main
	jobs:
	publish:
	runs-on: ubuntu-latest
	permissions:
	contents: write
	deployments: write
	name: Publish to GitHub Pages
	steps:
	- name: Checkout sources
	uses: actions/checkout@v4
	- name: Install Rust stable toolchain
	uses: dtolnay/rust-toolchain@stable
	- uses: Swatinem/rust-cache@v2
	with:
	cache-on-failure: true
	- name: Setup mdbook
	uses: peaceiris/actions-mdbook@v1
	with:
	mdbook-version: "latest"
	- name: Install mdbook plugins
	run: \|
	cargo install mdbook-katex mdbook-linkcheck mdbook-mermaid
	- name: Build book
	run: mdbook build
	- name: Add CNAME file
	run: echo "specs.optimism.io" > ./book/html/CNAME
	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	if: ${{ github.ref == 'refs/heads/main' }}
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./book/html

Provide feedback