Use printf instead of echo (shellcheck SC2028) #3

	name: CI

	on:
	pull_request:
	push:
	branches: [main]
	workflow_dispatch:

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: super-linter/super-linter/slim@v6
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	test-defaults:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Create .tool-versions file
	run: \|
	printf 'elixir 1.16.1-otp-26\nerlang 26.2.2\n' > .tool-versions
	- uses: ./
	- name: Check Erlang and Elixir versions
	run: \|
	elixir --version \| grep 'Erlang/OTP 26'
	elixir --version \| grep 'Elixir 1.16.1'
	test-inputs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: ./
	with:
	elixir-version: "1.15"
	otp-version: "25"
	- name: Check Erlang and Elixir versions
	run: \|
	elixir --version \| grep 'Erlang/OTP 25'
	elixir --version \| grep 'Elixir 1.15'

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