docs: update history zh / en (#1691)

* docs: update history.zh.md

* docs: update history.en.md

sites/x6-sites/docs/tutorial/basic/history.en.md

@@ -1,5 +1,5 @@
 ---
-title: 撤销/重做 Redo/Undo
+title: 撤销/重做 Undo/Redo
 order: 7
 redirect_from:
   - /en/docs

sites/x6-sites/docs/tutorial/basic/history.zh.md

@@ -1,5 +1,5 @@
 ---
-title: 撤销/重做 Redo/Undo
+title: 撤销/重做 Undo/Redo
 order: 7
 redirect_from:
   - /zh/docs