[openssl/openssl] 19641b: CHANGES.md: document BLAKE2b's "size"-setting support

[наб]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 19641b48afb57b48c8d67b44d3ed7054ee2c6bab
      https://github.com/openssl/openssl/commit/19641b48afb57b48c8d67b44d3ed7054ee2c6bab
  Author: наб <nabijaczleweli at nabijaczleweli.xyz>
  Date:   2023-11-02 (Thu, 02 Nov 2023)

  Changed paths:
    M CHANGES.md

  Log Message:
  -----------
  CHANGES.md: document BLAKE2b's "size"-setting support

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove at arm.com>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22583)