fix: thunderbird config

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

home/lander/wodan.nix

@@ -1,8 +1,10 @@
-{...}: {
+{pkgs, ...}: {
   imports = [
     ./global
     ./features/workstation
   ];
 
-  programs.thunderbird.enable = true;
+  home.packages = with pkgs; [
+    thunderbird
+  ];
 }