Account for UTC time to run the Dev-builds CI at midnight PT (#17718)

.azure/pipelines/devBuilds.yml

@@ -10,7 +10,7 @@ pr: none
 
 # Schedule this pipeline to run every midnight
 schedules:
-- cron: "0 0 * * *"
+- cron: "0 8 * * *"
   displayName: Daily midnight Dev builds
   branches:
     include: