submodules: update kak

diff --git a/dot-config/kak b/dot-config/kak
index 518df912da443bddb270123981b6f1fc255bdec5..289223dd6cfa10074381dbb835bc255575aa2ed0 160000 (submodule)
--- a/dot-config/kak
+++ b/dot-config/kak
@@ -1 +1 @@
-Subproject commit 518df912da443bddb270123981b6f1fc255bdec5
+Subproject commit 289223dd6cfa10074381dbb835bc255575aa2ed0