Additional line in PR description is appended when adding an autolink reference in square brackets in a PR description...

[eva-mueller-coremedia]

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Bug

Body

... after GitHub Action is running.

Reproduce

1. Create Autolink Reference viahttps://github.com/<ORG>/<REPO>/settings/key_links with Reference prefix TEST-
2. Create GitHub Action

GitHub Action

name: Test GHA

on:
  pull_request:
    branches:
      - main
    types: [opened, reopened, synchronize, edited, unlabeled]

jobs:
  test-job:
    runs-on: ubuntu-latest

    permissions:
      contents: read
      pull-requests: write

    steps:
      - name: Checkout repo
        uses: actions/[email protected]

      - name: Say Hi
        run: |
          echo "Hello World"

3. Create Pull Request with PR description: autolink test - TEST-1234
4. ✅ TEST-1234 will be correctly shown as link
5. ✅ Test GHA will modify the PR description after finished run
6. Update PR description to: PR description: autolink test - [TEST-1234]
7. 🐞 Test GHA will start and modifies the PR description to:

autolink test - [TEST-1234]

[TEST-1234]: https://<URL>/TEST-1234?...

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