Correct the documentation for OPENSSL_sk_find

Correct the documentation for OPENSSL_sk_find

Since April of 2023 with commit eb0935f, these functions have not
sorted the stack if it was not sorted. The documentation was noti
changed at the time to reflect this changed behaviour.

This corrects the documentation to reflect the current behaviour
of these functions

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28578)

(cherry picked from commit 07e70f951e7c4618b4a275d60f7410f77999f92a)