It looks like you're not testing with ansible-core 2.16. However, this is a requirement:
You MUST run CI against each of the “major versions” (2.10, 2.11, 2.12, etc) of ansible-base/ansible-core that the collection supports.
BTW you might consider dropping support for older / EOL versions of ansible-core (< 2.14). This is up to you, but I think a lot of collections already did this. Of course dropping support for ansible-core versions is considered a breaking change, so would require a new major release of your collection.
It looks like you're not testing with ansible-core 2.16. However, this is a requirement:
BTW you might consider dropping support for older / EOL versions of ansible-core (< 2.14). This is up to you, but I think a lot of collections already did this. Of course dropping support for ansible-core versions is considered a breaking change, so would require a new major release of your collection.