Update locales/en-US/strings.conf

locales/en-US/strings.conf

@@ -404,6 +404,7 @@
 !system 1352 Main message：
 !system 1353 Start at turn：
 !system 1354 Always chain when duel starts
+!system 1355 Surrender(1/2)
 !system 1356 Do you want to quit without saving?
 !system 1357 Ignore deck changes while quiting
 !system 1358 Search cards automatically