security/putty*: Security update 0.84 => 0.85

While here, add USE_XORG+=xrender since pterm seems to be linked to it.

Changelog: https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html
PR: 297593
Reported by: mandree (maintainer)
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3