chore: #3602658 Replace non-working GitLab release badges with drupal.org release shields

Rajab Natshahrequested to merge
issue/varbase-3602658:3602658-release-badge into 11.0.x

The GitLab release.svg badge always renders none on drupal.org-hosted projects (drupal.org creates git tags + release nodes, not GitLab Release objects). Replaced both Latest Release badges with static drupal.org release shields.

AI-assisted: Yes - prepared with Claude, reviewed by Rajab Natshah.

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