Semantic change in example code

Hello,

In example 6 under 4.13.2 Bread crumb navigation, an unordered list is
used. Since the elements have a hierarchical order should this be an
ordered list to be semantically correct?

https://www.w3.org/TR/html52/common-idioms-without-dedicated-elements.html#example-9c7d0afd

Thank you,

Jean-Bernard