DEV: (cmds) update CLUSTER SLOT-STATS command page (#2563)

Author: dwdougherty

content/commands/cluster-slot-stats.md

@@ -105,9 +105,14 @@ The command reports on the following statistics:
 
 * `KEY-COUNT`: Number of keys stored in the slot.
 * `CPU-USEC`: CPU time (in microseconds) spent handling the slot.
+* `MEMORY-BYTES`: Number of bytes allocated by the slot.
 * `NETWORK-BYTES-IN`: Total inbound network traffic (in bytes) received by the slot.
 * `NETWORK-BYTES-OUT`: Total outbound network traffic (in bytes) sent from the slot.
 
+{{< note>}}
+`MEMORY-BYTES` requires that you set `cluster-slot-stats-enabled` to `yes` in your `redis.conf` file.
+{{< /note >}}
+
 ## Redis Enterprise and Redis Cloud compatibility
 
 | Redis<br />Enterprise | Redis<br />Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> |