feat: change release trigger from push to weekly schedule

- Replace push trigger with schedule trigger for Tuesday at 12:00 UTC
- Preserve workflow_call and workflow_dispatch triggers for flexibility
- Aligns with existing build schedules (builds at 01:00 UTC, release at 12:00 UTC)

Assisted-by: Claude 3.5 Sonnet via GitHub Copilot

Co-authored-by: castrojo <[email protected]>

Author: Copilot

.github/workflows/generate-changelog-release.yml

@@ -1,10 +1,6 @@
 on:
-  push:
-    branches:
-      - main
-    tags:
-      - 'lts-*'
-      - 'lts.*'
+  schedule:
+    - cron: '0 12 * * 2'  # Every Tuesday at 12:00 UTC
   workflow_call:
     inputs:
       stream_name: