security/keepassxc: update 2.3.4 -> 2.4.0

• removed deprecated KeePassHTTP option
• added KeeShare option (Sharing integration with KeeShare)

PR: 236726
Submitted by: Andrew Romanenko <melanhit@gmail.com>
Relnotes: https://github.com/keepassxreboot/keepassxc/blob/develop/CHANGELOG