doc: Correct release-notes for sighashtype exceptions

Author: TheCharlatan

doc/release-notes-28113.md

@@ -2,6 +2,6 @@ RPC Wallet
 ----------
 
 - The `signrawtransactionwithkey`, `signrawtransactionwithwallet`,
-  `walletprocesspsbt` and `descriptorprocesspsbt` calls now return more
-  specific RPC_INVALID_PARAMETER instead of RPC_PARSE_ERROR if their
-  sighashtype argument is malformed or not a string.
+  `walletprocesspsbt` and `descriptorprocesspsbt` calls now return the more
+  specific RPC_INVALID_PARAMETER error instead of RPC_MISC_ERROR if their
+  sighashtype argument is malformed.