ports-mgmt/portfind: Update 1.6.3 => 1.6.4

Port changes:

• Remove perl5 from CATEGORIES.
• Update maintainer address.
• Update WWW and MASTER_SITES.
• Update pkg-descr.
• Sort PLIST_FILES (pet portfmt).

Commit log:
https://github.com/Thorsten-Geppert/portfind/compare/v1.6.3...v1.6.4

PR: 297281
Reported by: Thorsten Geppert <thorsten@tgeppert.de> (maintainer)
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3

(cherry picked from commit 4d5aad2430d2d9914e75b00492a32366cd5d4ac6)