release_charm.yaml: Race condition if commit added while workflow is running

[carlcsaposs-canonical]

release_charm.yaml fails to create GitHub release on git push tag

https://github.com/nextcloud-charmers/nextcloud-charms/actions/runs/5269541062/jobs/9527972305

[github-actions]

https://warthogs.atlassian.net/browse/DPE-2104

[carlcsaposs-canonical]

Appears to have been a race condition from adding a commit after the workflow starts and before git push tag

No issues when commit not added: https://github.com/nextcloud-charmers/nextcloud-charms/actions/runs/5270138121

[carlcsaposs-canonical]

Similar issue with internal __release.yaml workflow: https://github.com/canonical/data-platform-workflows/actions/runs/5671814833/job/15369708749

[carlcsaposs-canonical]

closing & re-opening to test jira sync

[carlcsaposs-canonical]

This is a GitHub bug: https://github.com/orgs/community/discussions/151442