Merge pull request #4764 from nojnhuh/aso-resync-default

explicitly set default AZURE_SYNC_PERIOD for ASO

Author: k8s-ci-robot

config/aso/settings.yaml

@@ -7,7 +7,7 @@ stringData:
   AZURE_AUTHORITY_HOST: ${AZURE_AUTHORITY_HOST:=""}
   AZURE_RESOURCE_MANAGER_ENDPOINT: ${AZURE_RESOURCE_MANAGER_ENDPOINT:=""}
   AZURE_RESOURCE_MANAGER_AUDIENCE: ${AZURE_RESOURCE_MANAGER_AUDIENCE:=""}
-  AZURE_SYNC_PERIOD: ${AZURE_SYNC_PERIOD:=""}
+  AZURE_SYNC_PERIOD: ${AZURE_SYNC_PERIOD:="1h"}
   # Per-resource Secrets will be created based on a Cluster's AzureClusterIdentity.
   AZURE_SUBSCRIPTION_ID: ""
   AZURE_TENANT_ID: ""