Prevent concurrent workflow runs on the same PR #1873
Merged
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Description of proposed changes
The previous concurrency key mostly did this, but did not consider that the PR's ref changes when a pull request is merged. In practice, this meant that closing/merging the PR shortly shortly after updating it would trigger two workflow runs. Only the latest run (cleanup) should continue.
Related issue(s)
Follow-up to #1870 (comment)
Checklist
If making user-facing changes, add a message in CHANGELOG.md summarizing the changes in this PR