security/zeek: Update to 4.0.6

https://github.com/zeek/zeek/releases/tag/v4.0.6

Security fixes since 4.0.5:

• Fix potential unbounded state growth in the FTP analyzer when receiving a specially-crafted stream of commands. This may lead to a buffer overflow and cause Zeek to crash. Due to the possibility of this happening with packets received from the network, this is a potential DoS vulnerabilty.

Other changes:

• Empty table constructors with &default attributes may cause a crash.
• Fix a bug in ZAM when a function containing a loop is inlined
• Fix a number of bugs with robust dictionary iteration.
• Fix missing "Reporter" entries when reporting hooks via zeek.

Reported by: Tim Wojtulewicz