Fixed SW QoS doc to use getClusterNodes

The QUIC tpu port number was incorrectly listed in
the docs. This change tells the user to get the
QUIC tpu port from the getClusterNodes RPC call.

content/guides/advanced/stake-weighted-qos.md

@@ -140,9 +140,8 @@ On the RPC you will have to use `--rpc-send-transaction-tpu-peer` to forward
 transactions to a specific leader. The exact usage would be
 `--rpc-send-transaction-tpu-peer HOST:PORT`. The Host is the ip address of the
 leader you have the `staked-nodes-overrides` enabled on and the Port is the QUIC
-TPU port of that host. The QUIC TPU port number is the lowest value of your
-`--dynamic-port-range` plus 9. For example, if the flag is
-`--dynamic-port-range 8000-8100`, the QUIC TPU port is `8009`.
+TPU port of that host. The QUIC TPU port for a leader can be identified by
+making an RPC call to [getClusterNodes](/docs/rpc/http/getClusterNodes.mdx).
 
 The peering would looking like the following: