Katja Blichfeld and Ben Sinclair, from 2013 crop of “25 New Faces,” have just debuted the latest episode of their awesome and very funny web series High Maintenance. “Matilda” deviates a little from the usual rules of the show as Sinclair’s unnamed pot dealer is for the first time the central figure in the story, and the action extends beyond its usual environs of New York City. For regular watchers of the show, there are also some welcome return appearances by notable characters from previous episodes; to say more would only be ruining things…