fix "hold to confirm" -> "hold to sign"

src_nbgl/ui_stark_transfer.c

@@ -87,7 +87,7 @@ static bool displayTransactionPage(uint8_t page, nbgl_pageContent_t *content) {
     content->type = INFO_LONG_PRESS,
     content->infoLongPress.icon = &ICONGLYPH;
     content->infoLongPress.text = "Review transaction";
-    content->infoLongPress.longPressText = "Hold to confirm";
+    content->infoLongPress.longPressText = "Hold to sign";
   }
 
   return false;