[openssl/openssl] 6de73f: CI: add Clang 16

[Sam James]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 6de73f5d795b74815740088274069b8778264bb8
      https://github.com/openssl/openssl/commit/6de73f5d795b74815740088274069b8778264bb8
  Author: Sam James <sam at gentoo.org>
  Date:   2023-02-23 (Thu, 23 Feb 2023)

  Changed paths:
    M .github/workflows/compiler-zoo.yml

  Log Message:
  -----------
  CI: add Clang 16

Clang 16 will be released shortly (beginning of March).

Signed-off-by: Sam James <sam at gentoo.org>

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20346)