hosts: homes: bazin: fix terminal name

Turns out I *can* use a more accurate terminfo entry for HTerm.

This fixes undercurl rendering in that terminal.

hosts/homes/ambroisie@bazin/default.nix

@@ -13,8 +13,8 @@
       enablePassthrough = true;
 
       terminalFeatures = {
-        # HTerm uses `xterm-256color` as its `$TERM`, so use that here
-        xterm-256color = { };
+        # HTerm configured to use a more accurate terminfo entry than `xterm-256color`
+        hterm-256color = { };
       };
     };