hosts: homes: mousqueton: 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@mousqueton/default.nix

@@ -19,8 +19,8 @@
       enableResurrect = 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 = { };
       };
     };
   };