Disable test_11g workflow for now

Change trigger to workflow_dispatch so it only runs manually.

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

Author: yahonda

.github/workflows/test_11g.yml

@@ -1,8 +1,7 @@
 name: test_11g
 
 on:
-  push:
-  pull_request:
+  workflow_dispatch:
 
 jobs:
   build: