What happened?

when running ./.github/actions/slack-workflow-notification passing slack_channel should result in channel being passed to the slack action.. but it seems it is not.

https://github.com/mozilla/addons-server/actions/runs/16366770038/job/46245712538?pr=23708

Example failing CI

What did you expect to happen?

channel should be passed correctly.

Is there an existing issue for this?

• I have searched the existing issues

┆Issue is synchronized with this Jira Task