security/zeek: Update to 6.0.4

https://github.com/zeek/zeek/releases/tag/v6.0.4

This release fixes the following bugs:

• The Mozilla CA and Google CT lists were updated to their latest versions.
• A crash with ICMP packets involving errant length checking was fixed.
• When a shadow file is empty/missing during rotation, Zeek aborts with an error message, but if the shadow file was empty, it will still be there after the restart.
• A new function remove_exclude was added to the PacketFilter framework which can be used to remove a previously added exclude filter by name.
• A new option --localversion was added to the configure script.
• The highwayhash submodule was updated to fix a build issue for FreeBSD.

Reported by: Tim Wojtulewicz