[health checker] Change config file.

Health checker needs to use catalyst's config file.

Change-Id: I00b919943eddf864b98080c28bb1956d8d8e9c97
diff --git a/cmd/health_checker/main.go b/cmd/health_checker/main.go
index 0d6375b..079756a 100644
--- a/cmd/health_checker/main.go
+++ b/cmd/health_checker/main.go
@@ -127,8 +127,8 @@
 	}
 
 	// First set the flags ...
-	flag.StringVar(&configFile, "config", "/etc/botanist/config.json",
-		"The path of the json config file that contains the nodename of the device. Format is defined in https://go.fuchsia.dev/tools/+/master/botanist/common.go")
+	flag.StringVar(&configFile, "config", "/etc/catalyst/config.json",
+		"The path of the json config file that contains the nodename of the device.")
 	flag.DurationVar(&timeout, "timeout", 10*time.Second,
 		"The timeout for checking each device. The format should be a value acceptable to time.ParseDuration.")
 	flag.BoolVar(&rebootIfUnhealthy, "reboot", false, "If true, attempt to reboot the device if unhealthy.")