Update copyright year in LICENSE and README

Editor assessment

The subject states exactly what changed: the copyright year was updated in the LICENSE and README. It is fully understandable without the diff, names both affected files, and the docs type is accurate. No body is present, which is entirely justifiable for a routine annual bump; there is no motivation a reader needs beyond what the subject says. The PR reference is the only footer and it is well formed. Style is clean throughout: imperative mood, no trailing period, comfortable length, no ticket junk, consistent language. A small change communicated exactly as a small change should be, with nothing to flag and nothing missing.