CI: make daily build occur every other hour on the odd hours.

.github/workflows/sub_weeklyBuild.yml

@@ -1,7 +1,7 @@
 name: Weekly Build
 on:
   schedule:
-   - cron: "0 19 * * *"
+   - cron: "0 1,3,5,7,9,11,13,15,17,19,21,23 * * *"
 
 permissions:
   contents: write