improve matrix #101

	name: Terraform CI - Lint

	on:
	[push]

	jobs:
	tf_lint:
	name: 'Terraform lint (on tf ${{ matrix.terraform_version }})'
	runs-on: ubuntu-latest
	strategy:
	matrix:
	terraform_version: [ '~1.5.0', '~1.6.0', '~1.7.0', 'latest'] # in theory, we go down to 1.0, but I think that's overkill for lint
	permissions:
	contents: 'read'
	id-token: 'write'
	steps:
	- name: Check out code
	uses: actions/checkout@v3

	- name: 'setup Terraform'
	uses: hashicorp/setup-terraform@v2
	with:
	terraform_version: ${{ matrix.terraform_version }}

	- name: 'lint Terraform code'
	# see https://www.terraform.io/cli/commands/fmt
	run:
	terraform fmt -check -recursive -diff .

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