[InterNetNews/inn] f541e4: Provide the date of the latest commit in snapshots

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: f541e4d2f78b02f68fc7bc3b654cf4106873cfbd
      https://github.com/InterNetNews/inn/commit/f541e4d2f78b02f68fc7bc3b654cf4106873cfbd
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2022-11-19 (Sat, 19 Nov 2022)

  Changed paths:
    M support/mksnapshot
    M support/mkversion

  Log Message:
  -----------
  Provide the date of the latest commit in snapshots

This way, we can use that date for prereleases, and ensure a reproducible build
depending on the source code, and not the date of the snapshot generation.