Update scalar_functions.md (#12627)

Remove extra space in reference to list_any_value

Author: Abdullahsab3

docs/source/user-guide/sql/scalar_functions.md

@@ -2130,7 +2130,7 @@ to_unixtime(expression[, ..., format_n])
 - [empty](#empty)
 - [flatten](#flatten)
 - [generate_series](#generate_series)
-- [list_any_value] (#list_any_value)
+- [list_any_value](#list_any_value)
 - [list_append](#list_append)
 - [list_sort](#list_sort)
 - [list_cat](#list_cat)