[openssl/openssl] 7197ab: updated the end copyright year in README.md to 2023

[Preveen P]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 7197abddb891933f52ec84dafb41b685d4a1d122
      https://github.com/openssl/openssl/commit/7197abddb891933f52ec84dafb41b685d4a1d122
  Author: Preveen Padmanabhan <dxb1230 at gmail.com>
  Date:   2023-06-21 (Wed, 21 Jun 2023)

  Changed paths:
    M README.md

  Log Message:
  -----------
  updated the end copyright year in README.md to 2023

CLA: trivial

Reviewed-by: Todd Short <todd.short at me.com>
Reviewed-by: Richard Levitte <levitte at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21225)