fix: trigger release workflow on push to master instead of tags

semantic-release runs on every push to master and decides internally
whether to cut a new release based on commit history; a tag-push trigger
is never fired by the workflow itself.

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

Author: farhan

.github/workflows/release.yml

@@ -1,8 +1,8 @@
 name: Release CI
 on:
   push:
-    tags:
-      - '*'
+    branches:
+      - master
 
 permissions:
   id-token: write  # Required for OIDC