Fix typo in SPECIFICATION.md #158

	name: CI
	on:
	# CI is run on main because new branches can only access caches from master, not previous branches.
	# So building on master allows new PR's to get the cache from before.
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:
	lint:
	timeout-minutes: 5

	runs-on: ubuntu-latest

	steps:
	- name: checkout
	uses: actions/checkout@v3

	- name: install node
	uses: actions/setup-node@v3
	with:
	cache: "yarn"
	node-version: "18"

	- name: Restore cached dependencies for Node modules
	id: module-cache
	uses: actions/cache@v2
	with:
	path: ${{ github.workspace }}/node_modules
	key: ${{ runner.os }}--node--${{ hashFiles('**/yarn.lock') }}

	- name: Install dependencies
	run: yarn install

	- name: Run prettier check
	run: yarn lint:check

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