Fix concurrency in atlantis-image workflow

[nitrocode]

what

• Set the concurrency to replace head_ref with ref
• Set the concurrency to replace run_id with run_number

why

• Fix concurrency in atlantis-image workflow
• Use ref because head_ref is only for pull_request events and this workflow does not run on PRs
• Use run_number because the id is always unique whereas the number starts at 1 and continues for each workflow

references

• Original commit 317b922
• https://docs.github.com/en/actions/learn-github-actions/contexts
• https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
• Run 2552
  • https://github.com/runatlantis/atlantis/actions/runs/3193021368/jobs/5211149751
  • https://github.com/runatlantis/atlantis/actions/runs/3193024995/jobs/5211157227

github.run_id string A unique number for each workflow run within a repository. This number does not change if you re-run the workflow run.

github.run_number string A unique number for each run of a particular workflow in a repository. This number begins at 1 for the workflow's first run, and increments with each new run. This number does not change if you re-run the workflow run.

Relevant atlantis-image workflow code

atlantis/.github/workflows/atlantis-image.yml

Lines 3 to 14 in 929a759

	on:
	push:
	branches:
	- 'master'
	tags:
	- v*.*.* # stable release like, v0.19.2
	- v*.*.*-pre.* # pre release like, v0.19.0-pre.calendardate
	workflow_dispatch:
	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
	cancel-in-progress: true

The atlantis-base workflow seems unaffected

https://github.com/runatlantis/atlantis/actions/workflows/atlantis-base.yml

[jamengual]

Thanks @nitrocode for the contribution