legacy/stellar: fix timebounds display (#582)

legacy/firmware/stellar.c

@@ -1699,13 +1699,13 @@ void stellar_layoutTransactionSummary(const StellarSignTx *msg) {
     memzero(str_timebound, sizeof(str_timebound));
 
     timebound = (time_t)msg->timebounds_end;
-    strlcpy(str_lines[0], _("Valid from:"), sizeof(str_lines[0]));
+    strlcpy(str_lines[2], _("Valid to:"), sizeof(str_lines[2]));
     if (timebound) {
       tm = gmtime(&timebound);
       strftime(str_timebound, sizeof(str_timebound), "%F %T (UTC)", tm);
-      strlcpy(str_lines[1], str_timebound, sizeof(str_lines[1]));
+      strlcpy(str_lines[3], str_timebound, sizeof(str_lines[3]));
     } else {
-      strlcpy(str_lines[1], _("[no restriction]"), sizeof(str_lines[1]));
+      strlcpy(str_lines[3], _("[no restriction]"), sizeof(str_lines[3]));
     }
   }