fix(examples): add missing argument

examples/avatar/main.go

@@ -82,7 +82,7 @@ func main() {
 	// Now lets format our base64 image into the proper format Discord wants
 	// and then call UserUpdate to set it as our user's Avatar.
 	avatar := fmt.Sprintf("data:%s;base64,%s", contentType, base64img)
-	_, err = dg.UserUpdate("", avatar)
+	_, err = dg.UserUpdate("", avatar, "")
 	if err != nil {
 		fmt.Println(err)
 	}