Remove HACS brands ignore now that brands PR is merged

The hoval_connect brand was accepted into home-assistant/brands
(PR #9607), so the HACS validation no longer needs to skip the
brands check.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: trcyberoptic

.github/workflows/validate.yml

@@ -15,7 +15,6 @@ jobs:
       - uses: hacs/action@main
         with:
           category: integration
-          ignore: brands
 
   hassfest:
     name: Hassfest