Adding clarifying text to validation guide #3323

	name: CI
	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	permissions:
	contents: read

	jobs:
	unit-test:
	name: unit test
	runs-on: ubuntu-20.04
	env:
	FORCE_COLOR: 1
	MIX_ENV: test
	strategy:
	fail-fast: false
	matrix:
	include:
	- elixir: '1.17.3'
	otp: '27.1'
	lint: lint
	- elixir: '1.17.3'
	otp: '25.0.4'
	- elixir: '1.11.4'
	otp: '21.3.8.24'

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Install Elixir and Erlang
	uses: erlef/setup-beam@v1
	with:
	elixir-version: ${{ matrix.elixir }}
	otp-version: ${{ matrix.otp }}
	- name: Restore deps and _build cache
	uses: actions/cache@v3
	with:
	path: \|
	deps
	_build
	key: ${{ runner.os }}-${{ matrix.elixir }}-${{ matrix.otp }}-${{ hashFiles('**/mix.lock') }}
	restore-keys: \|
	${{ runner.os }}-${{ matrix.elixir }}-${{ matrix.otp }}-
	- name: Install dependencies
	run: mix deps.get
	- name: Compile deps
	run: mix deps.compile
	- name: Check unused dependencies
	run: mix deps.unlock --check-unused
	if: ${{ matrix.lint }}
	- name: Compile lint
	run: mix compile --warning-as-errors
	if: ${{ matrix.lint }}
	- name: Run tests
	run: mix test

	integration-test:
	name: integration test
	runs-on: ubuntu-20.04
	env:
	FORCE_COLOR: 1
	strategy:
	fail-fast: false
	matrix:
	elixirbase:
	- "1.17.3-erlang-27.1-alpine-3.17.9"
	- "1.17.3-erlang-25.0.4-alpine-3.17.9"
	- "1.11.4-erlang-21.3.8.24-alpine-3.13.3"
	steps:
	- uses: earthly/actions-setup@v1
	- uses: actions/checkout@v3
	- name: ecto integration-test under ${{matrix.elixirbase}}
	run: earthly -P --ci --build-arg ELIXIR_BASE=${{matrix.elixirbase}} +integration-test

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