Could not read reconciler cron expression should be a warning

Changed from an error, since it returns a default value here, it shouldn't say it's an error, only warn that the file is not present.

pkg/reconciler/config.go

@@ -78,7 +78,7 @@ func determineCronExpression(configPath string) (string, error) {
 			return "", logging.Errorf("could not get flatipam config: %v", err)
 		}
 
-		_ = logging.Errorf("could not read file: %v, using expression from flatfile: %v", err, flatipam.IPAM.ReconcilerCronExpression)
+		logging.Verbosef("notice: could not read file: %v, defaulting to expression from configuration: %v", err, flatipam.IPAM.ReconcilerCronExpression)
 		return flatipam.IPAM.ReconcilerCronExpression, nil
 	}
 	logging.Verbosef("using expression: %v", strings.TrimSpace(string(fileContents))) // do i need to trim spaces? idk i think the file would JUST be the expression?