kak: Adjust settings for HTML files

Use default column indicator.
Use prettier for formatting.

config/kak/kakrc

···
 	m-whitespace spaces 2
 }
 
-# hook global WinSetOption filetype=html %{
-# 	m-columnindicator remove 100
-# 	m-columnindicator add 120
-# }
+hook global WinSetOption filetype=html %{
+	set-option buffer formatcmd "prettier --parser html"
+}
 
 hook global WinSetOption filetype=nix %{
 	set-option buffer formatcmd "nixpkgs-fmt"