Prerequisites

• I have carried out troubleshooting steps and I believe I have found a bug.
• I have searched for similar bugs in both open and closed issues and cannot find a duplicate.

Describe the bug

Some of the workflow runs for community-label.yml are failing.
https://github.com/woocommerce/woocommerce/actions/workflows/community-label.yml?query=is%3Acancelled

They fail with error Canceling since a higher priority waiting request for 'Add Community Label, Assign Reviewers-refs/heads/trunk' exists

The workflow currently has this concurrency step

concurrency:
    group: ${{ github.workflow }}-${{ github.ref }}
    cancel-in-progress: true

The github.ref is always returning trunk instead of the branch name so it appears like the workflow is already running when multiple are triggered at the same time. Perhaps use github.head_ref instead https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#running-your-pull_request_target-workflow-based-on-the-head-or-base-branch-of-a-pull-request

Expected behavior

All runs pass

Actual behavior

Some runs fail if there is another run in progress at the same time.
https://github.com/woocommerce/woocommerce/actions/workflows/community-label.yml?query=is%3Acancelled

Steps to reproduce

Go to https://github.com/woocommerce/woocommerce/actions/workflows/community-label.yml
See some runs are cancelled due to error

WordPress Environment

n/a

Isolating the problem

• I have deactivated other plugins and confirmed this bug occurs when only WooCommerce plugin is active.
• This bug happens with a default WordPress theme active, or Storefront.
• I can reproduce this bug consistently using the steps above.