patch 9.1.0991: v:stacktrace has wrong type in Vim9 script

Problem:  v:stacktrace has wrong type in Vim9 script.
Solution: Change the type to t_list_dict_any.  Fix grammar in docs.
          (zeertzjq)

closes: #16390

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/evalvars.c b/src/evalvars.c
index f5fef04..e0ca4b8 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -161,7 +161,7 @@
     {VV_NAME("t_typealias",	 VAR_NUMBER), NULL, VV_RO},
     {VV_NAME("t_enum",		 VAR_NUMBER), NULL, VV_RO},
     {VV_NAME("t_enumvalue",	 VAR_NUMBER), NULL, VV_RO},
-    {VV_NAME("stacktrace",	 VAR_LIST), &t_list_string, VV_RO},
+    {VV_NAME("stacktrace",	 VAR_LIST), &t_list_dict_any, VV_RO},
 };
 
 // shorthand