Fix/update staging smoketest cron (#2840)

* chore: update cron schedule for smoke test workflow

* chore: update cron schedule for smoke test workflow (used AM by mistake the fist time)

* fix: double check copilots suggestions 🧐 - skip hour 0

.github/workflows/smoke_test.yaml

@@ -5,7 +5,7 @@ on:
     branches:
       - "release-*"
   schedule:
-    - cron: "0 */3 * * *"
+    - cron: "0 3,6,9,12,15,18,21 * * *"
 defaults:
   run:
     shell: bash