Fix install command in readme #3

	name: CI

	on:
	push:
	pull_request:

	jobs:
	composer-validate:
	name: "Validate using Composer"
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: 8.3
	tools: composer:snapshot
	- name: Validate
	run: composer validate
	windows-get-extension-matrix:
	runs-on: ubuntu-latest
	outputs:
	matrix: ${{ steps.extension-matrix.outputs.matrix }}
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Get the extension matrix
	id: extension-matrix
	uses: php/php-windows-builder/extension-matrix@v1
	with:
	php-version-list: '8.0, 8.1, 8.2, 8.3, 8.4'
	windows-phpt-tests:
	needs: windows-get-extension-matrix
	name: "Windows PHPT Tests"
	runs-on: ${{ matrix.os }}
	strategy:
	matrix: ${{fromJson(needs.windows-get-extension-matrix.outputs.matrix)}}

	steps:
	- uses: actions/checkout@v4
	- name: Build and test the extension
	uses: php/php-windows-builder/extension@v1
	with:
	php-version: ${{ matrix.php-version }}
	ts: ${{ matrix.ts }}
	arch: ${{ matrix.arch }}
	run-tests: true
	linux-phpt-tests:
	name: "Linux PHPT Tests"
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: true
	matrix:
	os:
	- ubuntu-22.04
	php-version:
	- 8.0
	- 8.1
	- 8.2
	- 8.3
	- 8.4
	thread-safety:
	- zts
	- nts
	steps:
	- uses: actions/checkout@v4
	- name: Setup PHP ${{ matrix.php-version }} ${{ matrix.thread-safety }}
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-version }}
	env:
	phpts: ${{ matrix.thread-safety }}
	fail-fast: true
	- name: Build
	run: \|
	phpize
	make
	- name: Test
	run: make test

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