Updated the change log to include SSLv3 being disabled by default.

Updated the change log to include SSLv3 being disabled by default.

This change was implemented into version 1.1.0 and onward. The last version that had SSLv3 enabled was version 1.0.2h, which is why the addition was made where it is.

CLA: trivial

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Yang <kaishen.yy@antfin.com>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/27289)

(cherry picked from commit 6509f18c9fdbf76a63e8c6056da989cd047a7fb2)