Fix `github.ref` check for concurrency settings #361

	# This config uses industrial_ci (https://github.com/ros-industrial/industrial_ci.git).
	# For troubleshooting, see readme (https://github.com/ros-industrial/industrial_ci/blob/master/README.rst)

	name: Rolling - Downstream Build
	on:
	pull_request:
	branches:
	- ros2-master
	push:
	branches:
	- ros2-master

	concurrency:
	# cancel previous runs of the same workflow, except for pushes on given branches branch
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: ${{ !startsWith(github.ref, 'refs/heads') }}

	jobs:
	build-downstream:
	uses: ros-controls/ros2_control_ci/.github/workflows/reusable-industrial-ci-with-cache.yml@master
	strategy:
	fail-fast: false
	matrix:
	ROS_DISTRO: [kilted, rolling]
	with:
	ros_distro: ${{ matrix.ROS_DISTRO }}
	ros_repo: testing
	ref_for_scheduled_build: ros2-master
	not_test_build: true
	upstream_workspace: control_toolbox.${{ matrix.ROS_DISTRO }}.repos
	# we test the downstream packages, which are part of our organization
	downstream_workspace: ros_controls.${{ matrix.ROS_DISTRO }}.repos
	not_test_downstream: false

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