patch 8.2.3842: Vim9: can change locked list and list items

Problem:    Vim9: can change locked list and list items.
Solution:   Check that a list and list item isn't locked.
diff --git a/src/version.c b/src/version.c
index 5fffd73..d90560f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3842,
+/**/
     3841,
 /**/
     3840,