be more clear that the config file not found is not an error

cmd/root.go

@@ -93,7 +93,7 @@ func initConfig() {
 	// If a config file is found, read it in.
 	err := viper.ReadInConfig()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Config file not found at %s, using defaults\n", err)
+		fmt.Fprintf(os.Stderr, "Config file not found, using defaults: %s\n", err)
 	} else {
 		fmt.Fprintf(os.Stderr, "Using config file: %s\n", viper.ConfigFileUsed())
 	}