chore: validator doc -- Add payout wallet info (#515)

src/pages/nodes/validate/validator.mdx

@@ -160,3 +160,18 @@ zetacored tx slashing unjail --from=operator
 
 Check the transaction status for any error and confirm that your validator is
 part of the active set again with the command in the previous section.
+
+### Withdrawing Funds
+
+You can withdraw rewards including comissions using this command. 
+
+```bash
+zetacored tx distribution withdraw-rewards --commission [validator_address]
+```
+
+Optionally, you can set up different address to receive your payouts 
+instead of rewards being sent directly to the validator's wallet address. 
+
+```bash
+zetacored tx distribution set-withdraw-addr [withdraw-addr]
+```