In the previous blog post you discovered the first version of Data Vault methodology. But since the very first iteration, the specification evolved and a few years ago a version 2 was proposed. More adapted to the Big Data world, with several deprecation notes, and more examples adapted to the constantly evolving data world.
If you hear "agile", "adapted to the changes", you certainly think about Scrum, Kanban and generally the Agile methodology. And you're correct but it's worth knowing that the agile term also applies to the data. More exactly, to the data modeling with the approach called Data Vault.