Change MSVC Clang-CL build trigger to scheduled

Updated workflow to trigger on a schedule instead of push and pull_request events.

.github/workflows/msvc-static-build-clang-cl.yml

@@ -1,8 +1,8 @@
 name: MSVC Clang-CL Static Build
   
 on:
-  push:
-  pull_request:
+  schedule:
+    - cron: '0 0 */2 * *'
 
 permissions:
   contents: read # to fetch code (actions/checkout)