mod: update btcwallet to version with fix

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0
 	github.com/btcsuite/btclog v0.0.0-20241003133417-09c4e92e319c
 	github.com/btcsuite/btclog/v2 v2.0.1-0.20250728225537-6090e87c6c5b
-	github.com/btcsuite/btcwallet v0.16.14
+	github.com/btcsuite/btcwallet v0.16.15-0.20250805011126-a3632ae48ab3
 	github.com/btcsuite/btcwallet/wallet/txauthor v1.3.5
 	github.com/btcsuite/btcwallet/wallet/txrules v1.2.2
 	github.com/btcsuite/btcwallet/walletdb v1.5.1