runtime(new-tutor): update the "correct" text in tutor.tutor.json

Change from "Document '&variable'" to the expected correct result
"TODO: Document '&variable'"

closes: #17417

Signed-off-by: Phạm Bình An <phambinhanctb2004@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/tutor/tutor.tutor.json b/runtime/tutor/tutor.tutor.json
index 4fb18fb..9ee0974 100644
--- a/runtime/tutor/tutor.tutor.json
+++ b/runtime/tutor/tutor.tutor.json
@@ -2,8 +2,8 @@
   "expect": {
 	"56": "This is text with **important information**",
 	"57": "This is text with **important information**",
-	"64": "Document '&variable'",
-	"65": "Document '&variable'",
+	"64": "TODO: Document '&variable'",
+	"65": "TODO: Document '&variable'",
 	"71": "# This is a level 1 header",
 	"72": "# This is a level 1 header",
 	"73": "### This is a level 3 header",