Update action version to 4 #100

	---
	name: isotovideo - check all test modules
	# yamllint disable-line rule:truthy
	on: [push, pull_request]
	jobs:
	test:
	# "ubuntu-latest" at time of writing 2020-12-14 is Ubuntu 18.04 showing a
	# network problem "level=error msg="could not find slirp4netns, the
	# network namespace won't be configured: exec: \"slirp4netns\": executable
	# file not found in $PATH""
	# which can be fixed with a more recent version of Ubuntu explicitly
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v4
	- name: Run isotovideo against test code, fail if any test module failed
	run: podman run --rm -it -v .:/tests:Z --entrypoint '' registry.opensuse.org/devel/openqa/containers/isotovideo:qemu-x86-jq /bin/sh -c 'isotovideo --exit-status-from-test-results qemu_no_kvm=1 casedir=/tests'

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