feat(cicd-github-actions): add support for workflow description

[neilime]

GitHub Action workflow do not have "description" field, so we had to get from comment at the beginning of the yaml file.

Example:

# Workflow to greet new contributors.
# Mainly using [First Interaction Action](https://github.com/actions/first-interaction), with some opinionated defaults.
# - On issue creation, a comment is added to the issue.
# - On first contribution, a comment is added to the pull request.
---
name: Greetings

on:
  issues:
    types: [opened]
  pull_request_target:
    branches: [main]

  workflow_call:
    inputs:
      runs-on:
        description: "JSON array of runner(s) to use. See <https://docs.github.com/en/actions/using-jobs/choosing-the-runner-for-a-job>."
        type: string
        default: '["ubuntu-latest"]'
        required: false

description should be:

Workflow to greet new contributors.
Mainly using [First Interaction Action](https://github.com/actions/first-interaction), with some opinionated defaults.
- On issue creation, a comment is added to the issue.
- On first contribution, a comment is added to the pull request.