ci: trigger workflow on master too

The default branch here is master, not main — the workflow's
push.branches list was set to [main] only, so CI never ran on commits
to master.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: detain

.github/workflows/test.yml

@@ -2,7 +2,7 @@ name: tests
 
 on:
   push:
-    branches: [main]
+    branches: [master, main]
   pull_request:
 
 jobs: