set build and lint concurrency #22

	---
	name: Lint Files

	# Events: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows
	on:
	# Run workflow on push except for ignored branches and paths
	push:
	branches-ignore:
	- 'cherry-pick-*'
	paths-ignore:
	- '**.md' # Ignore documentation change
	# Run workflow on pull request
	pull_request: # By default, a workflow only runs when a pull_request event's activity type is opened, synchronize, or reopened

	# Allow other Workflows to call this Workflow
	workflow_call:

	# Run a single job at a time: https://docs.github.com/en/actions/using-jobs/using-concurrency
	concurrency:
	group: lint-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	lint:
	runs-on: ubuntu-latest # GitHub-hosted runners: https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
	steps:
	- name: Clone
	uses: actions/checkout@v4 # https://github.com/marketplace/actions/checkout
	- name: YAML Lint
	run: yamllint . # yamllint is pre-installed: https://github.com/actions/runner-images/blob/main/images/linux/Ubuntu2204-Readme.md#tools

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