[openssl/openssl] 008d81: BIO_read.pod: fix small typo

[Andrea Pappacoda]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 008d81694d5507aa717eb19401def64e68ef636a
      https://github.com/openssl/openssl/commit/008d81694d5507aa717eb19401def64e68ef636a
  Author: Andrea Pappacoda <andrea at pappacoda.it>
  Date:   2023-01-31 (Tue, 31 Jan 2023)

  Changed paths:
    M doc/man3/BIO_read.pod

  Log Message:
  -----------
  BIO_read.pod: fix small typo

Add missing `I` to `<b>`

CLA: trivial

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20169)

(cherry picked from commit 0414899887b98f973067f286ac126d8b529873e3)