update RELEASE

Author: zhufuyi

.github/RELEASE.md

@@ -1,25 +1,4 @@
 ## Change log
 
-1. Adjust errcode package, support custom error message.
-
-example:
-
-```go
-//http code
-    // code(10003) and message
-    ecode.InvalidParams.Err("custom error message")
-    // code(400) and message
-    ecode.InvalidParams.ErrToHTTP("custom error message")
-
-// grpc code
-    // code(30003) and message
-    ecode.StatusInvalidParams.Err("custom error message")
-    // code(3) and message
-    ecode.StatusInvalidParams.ToRPCErr("custom error message")
-    // code(30003) and message, use in grpc-gateway
-    ecode.StatusInvalidParams.ErrToHTTP("custom error message")
-```
-
-2. Optimize print log, grpc support custom marshal data.
-
-3. Adjust some code.
+1. Fix logging bug [#59](https://github.com/zhufuyi/sponge/issues/59).
+2. Add custom jwt authentication in grpc service.