Update cluster-slots

ref: valkey-io/valkey#265

Signed-off-by: Roshan Khatri <rvkhatri@amazon.com>

commands/cluster-slots.md

@@ -34,7 +34,8 @@ Each nested result is:
   - ...continues until all replicas for this master are returned.
 
 Each result includes all active replicas of the master instance
-for the listed slot range.  Failed replicas are not returned.
+for the listed slot range. These replicas are ordered deterministically.  
+Failed replicas are not returned.Signed-off-by: Roshan Khatri <rvkhatri@amazon.com>
 
 The third nested reply is guaranteed to be the networking information of the master instance for the slot range.
 All networking information after the third nested reply are replicas of the master.