[openssl/openssl] 6cde90: Fix documentation regarding KMAC sizes

[Michael Hinz]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 6cde903a369250719fd177727de97a7aebdd7bc6
      https://github.com/openssl/openssl/commit/6cde903a369250719fd177727de97a7aebdd7bc6
  Author: Michael Hinz <michael at hinz.no>
  Date:   2023-11-06 (Mon, 06 Nov 2023)

  Changed paths:
    M doc/man7/EVP_MAC-KMAC.pod

  Log Message:
  -----------
  Fix documentation regarding KMAC sizes

As per recommendation by jfinkhaeuser, this documents the defaults for
KMAC-128 as 32 and for KMAC-256 as 64. The code already accomodates for
these values, so no changes are needed there.

Fixes #22381

CLA: trivial

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22614)

(cherry picked from commit 56d1ab3b6c7468ce0f534f09e305a539101f9c3d)