None of the docs on filters https://circleci.com/docs/2.0/configuration-reference/#filters-1 explain how to use regex. I stumbled across teh following very useful docs https://circleci.com/docs/2.0/workflows/#using-regular-expressions-to-filter-tags-and-branches when clicking a link titled 'Executing Workflows For a Git Tag', which does not hint at its being the place to go for regex info.It'd be a big improvement - avoiding much head scratching over untriggered builds - if this could be documented clearly in the filters sections

CCI-I-1543