vimPlugins.lf-vim: switch dependency to vim-floaterm

Switch `lf-vim` dependency from `vim-bbye` to `vim-floaterm` because of https://github.com/ptzz/lf.vim/commit/9cc8789af29471ffaab637303baa67737215a1c6

pkgs/misc/vim-plugins/overrides.nix

@@ -656,7 +656,7 @@ self: super: {
   });
 
   lf-vim = super.lf-vim.overrideAttrs (old: {
-    dependencies = with super; [ vim-bbye ];
+    dependencies = with super; [ vim-floaterm ];
   });
 
   vim-stylish-haskell = super.vim-stylish-haskell.overrideAttrs (old: {