name: Python
on:
  workflow_dispatch:
    inputs:
      build:
        required: true
        type: number
jobs:
  no-op:
    runs-on: ubuntu-latest
    steps:
      - run: echo "These aren't the droids you're looking for."
        shell: bash

Add the no-op GitHub Actions workflow for Python releases.
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 <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>
Reviewed-by: Alex Chernyakhovsky <7d8f1034c38249e22bb157c14849fb2873ab27f4@google.com>
