build: update btcwallet dependency introducing pruned bitcoind support

This is achieved by some recent work within the BitcoindClient enabling
it to retrieve pruned blocks from its server's peers.

lnd.go

@@ -543,6 +543,9 @@ func Main(cfg *Config, lisCfg ListenerCfg, interceptor signal.Interceptor) error
 		NeutrinoCS:                  neutrinoCS,
 		ActiveNetParams:             cfg.ActiveNetParams,
 		FeeURL:                      cfg.FeeURL,
+		Dialer: func(addr string) (net.Conn, error) {
+			return cfg.net.Dial("tcp", addr, cfg.ConnectionTimeout)
+		},
 	}
 
 	activeChainControl, err := chainreg.NewChainControl(chainControlCfg)