[openssl/openssl] f15d23: Replace "a RSA" with "an RSA"

[faramir-dev]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: f15d23e2f9ec10a0c6ccd76317c0c8aeb5378a33
      https://github.com/openssl/openssl/commit/f15d23e2f9ec10a0c6ccd76317c0c8aeb5378a33
  Author: Daniel Fiala <daniel at openssl.org>
  Date:   2022-12-07 (Wed, 07 Dec 2022)

  Changed paths:
    M CHANGES.md
    M crypto/rsa/rsa_mp.c
    A demos/encode/rsa_encode.c
    M doc/HOWTO/certificates.txt
    M doc/HOWTO/keys.txt
    M doc/man3/SSL_CTX_set_cipher_list.pod
    M doc/man3/SSL_CTX_use_certificate.pod
    M doc/man3/SSL_CTX_use_serverinfo.pod
    M test/keymgmt_internal_test.c
    M test/sslapitest.c

  Log Message:
  -----------
  Replace "a RSA" with "an RSA"

Fixes openssl#19771

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre at ncp-e.com>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19787)

(cherry picked from commit a63fa5f711f1f97e623348656b42717d6904ee3e)
(cherry picked from commit f3e9308fe1b692c424feaa256fbecce958cef1f4)