The ltree example could lead to misunderstandings on usage of the ltree type

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/ltree.html
Description:

For all documentation versions of
https://www.postgresql.org/docs/14/ltree.html the example
"Top.Countries.Europe.Russia" is not entirely correct: Russia is located in
both Europe and Asia. This mistake could lead to conceptual
misunderstandings around the ltree type: aka that ltree supports a
graph-like data structure.

Let's replace that example with something that better represents the ltree
type.