Restore Hugo Pages deployment for modern docs site

[Copilot]

The repo was deploying two different Pages sites: the intended Hugo Book docs and the legacy root Jekyll site. GitHub Pages was serving the old Jekyll output, which hid the modern Hugo navigation and Chennai FOSS docs content.

• Root cause

  • The Hugo Pages workflow no longer explicitly enabled GitHub Actions as the Pages source.
  • That allowed the legacy root Pages/Jekyll build to win and publish the old site from the repository root.

• Change

  • Restored enablement: true on actions/configure-pages@v5 in /home/runner/work/devops_os/devops_os/.github/workflows/pages.yml.
  • This reasserts the Hugo workflow as the Pages publisher for https://cloudengine-labs.github.io/devops_os/.

• Impact

  • Brings back the Hugo Book docs experience with left-hand navigation.
  • Preserves the Hugo-generated docs routes and the Chennai FOSS presentation page/link already present under hugo-docs/.

• Relevant workflow delta

- name: Setup GitHub Pages
  id: pages
  uses: actions/configure-pages@v5
  with:
    enablement: true