[Firebird-website] Firebird 3 banner links to 3.0.0 release

[marius a. p. <ma...@gm...>]

Firebird 3 banner on the right links to 3.0.0 release

should go to the 3.0 page with latest 3.0.x release

http://www.firebirdsql.org/en/firebird-3-0/