kak: update submodule

diff --git a/dot-config/kak b/dot-config/kak
index 8a5966cdd083deb9afcb240970f8ee020ae26e40..d4724b4dc335b91da5c7ae0345df4637f8f85a3c 160000 (submodule)
--- a/dot-config/kak
+++ b/dot-config/kak
@@ -1 +1 @@
-Subproject commit 8a5966cdd083deb9afcb240970f8ee020ae26e40
+Subproject commit d4724b4dc335b91da5c7ae0345df4637f8f85a3c