change readme

Author: changsongl

README.md

@@ -45,7 +45,7 @@ bin/delayqueue -help
   -config.file string
         config file (default "../../config/config.yaml")
   -config.type string
-        config type
+        config type: yaml, json
   -env string
         delay queue env: debug, release (default "release")
   -version

README_ZH.md

@@ -42,7 +42,7 @@ bin/delayqueue -help
   -config.file string
         config file (default "../../config/config.yaml")
   -config.type string
-        config type
+        config type: yaml, json
   -env string
         delay queue env: debug, release (default "release")
   -version

cmd/delayqueue/main.go

@@ -25,7 +25,7 @@ import (
 var (
 	// configuration and environment
 	configFile = flag.String("config.file", "../../config/config.yaml", "config file")
-	configType = flag.String("config.type", "", "config type")
+	configType = flag.String("config.type", "", "config type: yaml, json")
 	env        = flag.String("env", "release", "delay queue env: debug, release")
 	version    = flag.Bool("version", false, "display build info")