Add the no-op GitHub Actions workflow for Python releases.

https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch doesn't mention it, but https://docs.github.com/en/actions/managing-workflow-runs/manually-running-a-workflow#configuring-a-workflow-to-run-manually says: "To trigger the `workflow_dispatch` event, your workflow must be in the default branch."

What wasn't made clear is that the workflow must also be in any
non-default branches on which it will be triggered. (Otherwise,
"Workflow does not exist or does not have a `workflow_dispatch`
trigger in this branch." errors will occur.)

Change-Id: Iead894f4bc63a89d190194a8b77da732e055a0d8
Reviewed-on: https://code-review.googlesource.com/c/re2/+/60614
Reviewed-by: Paul Wankadia <junyer@google.com>
Reviewed-by: Alex Chernyakhovsky <achernya@google.com>
1 file changed