[openssl/web] 9f9cef: Mention the OpenSSL OMC key among release keys

[Tomáš Mráz]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/web
  Commit: 9f9cef27d928e9f32a2202f1345ffe7d2d2d8d60
      https://github.com/openssl/web/commit/9f9cef27d928e9f32a2202f1345ffe7d2d2d8d60
  Author: Tomas Mraz <tomas at openssl.org>
  Date:   2023-08-02 (Wed, 02 Aug 2023)

  Changed paths:
    M source/index.md

  Log Message:
  -----------
  Mention the OpenSSL OMC key among release keys

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tim Hudson <tjh at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
(Merged from https://github.com/openssl/web/pull/415)