This is effectively the announcement of discontinuation of software, and anything relating to that is usually signed. For example, Bitcoin Core release notes ar

This is effectively the announcement of discontinuation of software, and anything relating to that is usually signed. For example, Bitcoin Core release notes are signed when sent out via email, the binaries are reproducibly built and signed many times, and most git commits are signed by their author (and all merge commits are): https://github.com/bitcoin/bitcoin/commits/master https://github.com/bitcoin/bitcoin/commits/master