x11-wm/sway: update to 1.7

Changes: https://github.com/swaywm/sway/releases/tag/1.7
Changes: https://github.com/swaywm/sway/compare/1.7-rc3...1.7
Reported by: GitHub (watch releases)

(cherry picked from commit ec0e1ef979ac1e61d7bada595db73fb1fa85d1e8)