Pressing the clipboard icon to copy GitHub Workflow YAML puts `undefined` in clipboard

[brettchalupa]

Repro Steps

1. Create a new package
2. On the /publish page of your package, click the copy icon where the YAML is shown

Expected: Clipboard to contain:

name: Publish
on:
  push:
    branches:
      - main

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
      - uses: actions/checkout@v4
      - name: Publish package
        run: npx jsr publish

Actual: Clipboard contains undefined

Screenshot of the area:

It happens for both the publish.yml path and the actual yaml code.