[openssl/openssl] 8e90a1: Fix BIO_dgram_pair stochastic test failure

[Hugo Landau]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 8e90a12ad82dec6d8b683eaa2e4feafa9796d377
      https://github.com/openssl/openssl/commit/8e90a12ad82dec6d8b683eaa2e4feafa9796d377
  Author: Hugo Landau <hlandau at openssl.org>
  Date:   2022-09-23 (Fri, 23 Sep 2022)

  Changed paths:
    M test/bio_dgram_test.c

  Log Message:
  -----------
  Fix BIO_dgram_pair stochastic test failure

Fixes #19267.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19268)