security/zeek: Update to 8.0.8

https://github.com/zeek/zeek/releases/tag/v8.0.8

This release fixes the following potential DoS vulnerability:

• A specially-crafted series of MIME headers sent via SMTP or HTTP could cause Zeek to use large amounts of memory and potentially crash.

This release fixes the following potential DoS vulnerability:

• Sqlite storage backends no longer potentially write data into a single database file across multiple unrelated backend handles.
• A crash in the table code was fixed if reallocation failed while resizing.

Reported by: Tim Wojtulewicz