update readme

@@ -15,16 +15,17 @@ gostash -f etc/config.yaml
 config.yaml示例如下:
 
 ```yaml
-Input:
+Processors:
+- Input:
     Kafka:
       Name: gostash
       Brokers:
-      - 172.16.186.16:19092
-      - 172.16.186.17:19092
+        - "172.16.186.16:19092"
+        - "172.16.186.17:19092"
       Topic: k8slog
       Group: pro
       NumProducers: 16
-Filters:
+  Filters:
     - Action: drop
       Conditions:
         - Key: k8s_container_name
@@ -50,11 +51,11 @@ Filters:
         - prospector
         - source
         - stream
-Output:
+  Output:
     ElasticSearch:
       Hosts:
-      - 172.16.141.4:9200
-      - 172.16.141.5:9200
+        - "172.16.141.4:9200"
+        - "172.16.141.5:9200"
       DailyIndexPrefix: k8s_pro-
 ```
 

@@ -18,7 +18,7 @@ import (
 
 const dateFormat = "2006.01.02"
 
-var configFile = flag.String("f", "etc/config.json", "Specify the config file")
+var configFile = flag.String("f", "etc/config.yaml", "Specify the config file")
 
 func main() {
 	flag.Parse()