editors/xed: update to 3.2.4

Changes: https://github.com/linuxmint/xed/compare/3.2.2...3.2.4

Note: port lineage comes from the freebsd-ports-gnome repo since
2018, not what was committed since 2020:

• https://github.com/freebsd/freebsd-ports-gnome/pull/29
• https://github.com/freebsd/freebsd-ports-gnome/pull/33
• https://github.com/freebsd/freebsd-ports-gnome/pull/38
• https://github.com/freebsd/freebsd-ports-gnome/pull/39

Approved by: arrowd (mentor)
Differential Revision: https://reviews.freebsd.org/D35706