Change schedule for testing (#397)

Author: PaulHigin

.ci/ci_auto.yml

@@ -4,10 +4,10 @@ pr: none
 
 schedules:
 # Use https://crontab.guru/#0_8_*_*_* to compute crontab expression
-# Temporary schedule to run every 30 minutes, to investigate test failures
-# - cron: "*/30 * * * *"
 # Run signed build, with limited signing cert, every day at 9 am
-- cron: 0 9 * * *
+# - cron: 0 9 * * *
+# Temporary schedule to run every 30 minutes, to investigate test failures
+- cron: "*/30 * * * *"
   branches:
     include:
     - refs/heads/master