modify redis cluster config comment

cmd/proxy/proxy-cluster-example.toml

@@ -95,8 +95,8 @@ node_connections = 2
 ping_fail_limit = 3
 # A boolean value that controls if server should be ejected temporarily when it fails consecutively ping_fail_limit times.
 ping_auto_eject = false
-# A list of server address, port and weight (name:port:weight or ip:port:weight) for this server pool. Also you can use alias name like: ip:port:weight alias.
+# A list of server address, port (name:port or ip:port) for this server pool when cache type is redis_cluster.
 servers = [
-    "127.0.0.1:7000:1",
-    "127.0.0.1:7001:2",
+    "127.0.0.1:7000",
+    "127.0.0.1:7001",
 ]