fix doc

Signed-off-by: seeflood <[email protected]>

demo/pubsub/README.md

@@ -3,16 +3,16 @@ It is worth noting that both server and client demo should set the same store na
 For example:   
 ```shell
 cd ${project_path}/demo/pubsub/server/
-// 1. start subscriber
+# 1. start subscriber
 go build -o subscriber
 /.subscriber -s pub_subs_demo
 
-// 2. start layotto
+# 2. start layotto
 cd ${project_path}/cmd/layotto
 go build -o layotto
-./layotto start -c ../../configs/config_in_memory.json
+./layotto start -c ../../configs/config_standalone.json
 
-// 3. start publisher
+# 3. start publisher
  cd ${project_path}/demo/pubsub/client/
 go build -o publisher
  ./publisher -s pub_subs_demo