net/v2ray: Update 5.39.0 => 5.40.0

Changelogs:

• https://github.com/v2fly/v2ray-core/releases/tag/v5.40.0
• https://github.com/v2fly/v2ray-core/compare/v5.39.0...v5.40.0

Approved by: yuri@ (Mentor)
Differential Revision: https://reviews.freebsd.org/D53003