Case C-93/19 P: Judgment of the Court (Fourth Chamber) of 19 November 2020 — European External Action Service v Chantal Hebberecht (Appeal — Civil service — Officials — European External Action Service (EEAS) — Policy of rotating officials — Position of Head of the European Union Delegation to Ethiopia — Decision refusing to extend the assignment to that position — Interests of the service — Principle of equal treatment — Positive discrimination in favour of the under-represented sex — Article 1d of the Staff Regulations of Officials of the European Union)