README: minor markdown tweaks #131

	name: Validate

	on:
	# Run on all pushes and pull requests.
	push:
	pull_request:
	# Also run this workflow on day 15 of every month as the repo isn't that active.
	schedule:
	- cron: '0 0 15 * *'
	# Allow manually triggering the workflow.
	workflow_dispatch:

	permissions: {}

	jobs:
	validate:
	# Don't run the cron job on forks.
	if: ${{ github.event_name != 'schedule' \|\| github.event.repository.fork == false }}

	runs-on: ubuntu-latest

	strategy:
	fail-fast: true
	matrix:
	php: ['5.4', 'latest']

	name: PHP ${{ matrix.php }}

	steps:
	- name: Checkout code
	uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
	with:
	persist-credentials: false

	- name: Install PHP
	uses: shivammathur/setup-php@bf6b4fbd49ca58e4608c9c89fba0b8d90bd2a39f # 2.35.5
	with:
	php-version: ${{ matrix.php }}
	coverage: none

	- name: Install dependencies
	run: composer update --no-interaction --no-progress

	- name: Validate Composer installation
	run: composer validate --no-check-all --strict

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