Fix topgrade config :( (#31)

There should be a top-level MISC for topgrade.toml.

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

users/alice/home.nix

@@ -62,10 +62,12 @@
     topgrade = {
       enable = true;
       settings.config = {
+        misc = {
           disable = [ "system" "nix" ];
         };
       };
     };
+  };
 
   home.stateVersion = "23.11";
 }