zone defaults to public, instead of default_zone

[goniomdq]

Most tasks where a zone is required default to 'public'.
I suggest they should default to 'default_zone' and then to public, which can be achieved by doing this:
zone: "{{ item.value.zone|default(default_zone|default('public')) }}"

[FlatKey]

@goniomdq Thank you for this enhancement hint, I'll try it.