Fix list to dict example (#73213)

##### SUMMARY
<!--- Your description here -->
single_list must be transformed to a list of pairs before feeding it into dict()

##### ISSUE TYPE
- Docs Pull Request

+label: docsite_pr

docs/docsite/rst/user_guide/complex_data_manipulation.rst

@@ -198,7 +198,7 @@ These example produces ``{"a": "b", "c": "d"}``
 
   vars:
       single_list: [ 'a', 'b', 'c', 'd' ]
-      mydict: "{{ dict(single_list) | slice(2) | list }}"
+      mydict: "{{ dict(single_list | slice(2) | list) }}"
 
 
 .. code-block:: YAML+Jinja