lnd: correct typo in cipher suite sets, use sha2

lnd.go

@@ -77,7 +77,7 @@ var (
 	tlsCipherSuites = []uint16{
 		tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
 		tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
-		tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+		tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA256,
 		tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
 		tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
 	}