Update ChangeLog to add FIPS

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>

ChangeLog

@@ -11,6 +11,7 @@ version 0.9.0 (released 2019-02-xx)
   * Added support for Encrypt-then-MAC mode
   * Added support for parsing server side configuration file
   * Added support for ECDSA/Ed25519 certificates
+  * Added FIPS 140-2 compatibility
   * Improved known_hosts parsing
   * Improved documentation
   * Improved OpenSSL API usage for KEX, DH, and signatures