rl-next: Fix and support markdown frontmatter syntax (cherry picked from commit 69b7876a0810269ad71807594cfd99b26cd8a5ff) Change-Id: I8bfb8967af0943080fdd70d257c34abaf0a9fedf
Automatically compile hand-written release notes with `changelog-d` (cherry picked from commit 928f0c13414d20c1af88b30bd6700fd730ee0bab) Change-Id: Ia0685835c52edf185b64dd696b19305746c077e5