[openssl/tools] 85972a: Don't cross-post security advisories to oss-security

[Matt Caswell]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/tools
  Commit: 85972a475ef91042e6be0eda4db3202ccc6d0fd2
      https://github.com/openssl/tools/commit/85972a475ef91042e6be0eda4db3202ccc6d0fd2
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-05-04 (Thu, 04 May 2023)

  Changed paths:
    M HOWTO-make-a-release.md

  Log Message:
  -----------
  Don't cross-post security advisories to oss-security

We should send any security advisory to oss-security separately and not
cross-post it with our own lists.

We also change the text to say that security advisories should be sent to
support-announce regardless of whether a premium release has been affected.

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/tools/pull/139)