Add docs for CLIENT LIST new input/output stats (#1475)

Author: minchopaskal

content/commands/client-list/index.md

@@ -117,6 +117,9 @@ Here is the meaning of the fields:
 * `rbp`: peak size of the client's read buffer since the client connected. Added in Redis 7.0
 * `rbs`: current size of the client's read buffer in bytes. Added in Redis 7.0
 * `io-thread`: id of I/O thread assigned to the client. Added in Redis 8.0
+* `tot-net-in`: total network input bytes read from this client.
+* `tot-net-out`: total network output bytes sent to this client.
+* `tot-cmds`: total count of commands this client executed.
 
 The client flags can be a combination of: