Use ORG_TOKEN secret for org stats (read:org scope)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pokutta

.github/workflows/fetch-blog.yml

@@ -50,7 +50,7 @@ jobs:
 
       - name: Fetch GitHub org stats
         env:
-          GH_TOKEN: ${{ github.token }}
+          GH_TOKEN: ${{ secrets.ORG_TOKEN }}
         run: |
           python3 - <<'PYEOF'
           import urllib.request, json, os