ci: trigger workflow on tag pushes so publish job runs

The publish job requires `startsWith(github.ref, 'refs/tags/v')` but
the workflow only triggered on `push: branches: [master]`, which
excluded tag pushes entirely. Added `tags: ['v*']` to the push trigger.

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

Author: userFRM

.github/workflows/ci.yml

@@ -3,6 +3,7 @@ name: CI
 on:
   push:
     branches: [master]
+    tags: ['v*']
   pull_request:
     branches: [master]