[openssl/web] 2c521b: Actually use FUTURESIERIES where it's supposed to.

[Richard Levitte]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/web
  Commit: 2c521b9623f177124ba9e71959d47bbceb89f1e2
      https://github.com/openssl/web/commit/2c521b9623f177124ba9e71959d47bbceb89f1e2
  Author: Richard Levitte <levitte at openssl.org>
  Date:   2023-10-26 (Thu, 26 Oct 2023)

  Changed paths:
    M Makefile

  Log Message:
  -----------
  Actually use FUTURESIERIES where it's supposed to.

It's currently only used for source listing...