fix(ci): use GITHUB_TOKEN directly for GitHub Models

The GH_MODELS_TOKEN secret appears invalid. Use GITHUB_TOKEN
directly to diagnose — it has GitHub Models access by default.

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

Author: christso

.github/workflows/evals.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Configure credentials
         run: |
           cat > .env <<EOF
-          GH_MODELS_TOKEN=${{ secrets.GH_MODELS_TOKEN || secrets.GITHUB_TOKEN }}
+          GH_MODELS_TOKEN=${{ secrets.GITHUB_TOKEN }}
           GH_MODELS_MODEL=${{ vars.GH_MODELS_MODEL || 'gpt-5-mini' }}
           COPILOT_MODEL=${{ vars.COPILOT_MODEL || 'gpt-5-mini' }}
           EOF