security/vuxml: Mark zeek < 7.0.2 as vulnerable as per:

https://github.com/zeek/zeek/releases/tag/v7.0.2

This release fixes the following potential DoS vulnerability:

• The POP3 parser has been hardened to avoid unbounded state growth in the face of one-sided traffic capture or when enabled for non-POP3 traffic.

Reported by: Tim Wojtulewicz