[user module] set sops key path

also this should be moved into a different module later i think

machines/modules/malobeo/users.nix

@@ -52,7 +52,13 @@ in
     })
     {
       users.mutableUsers = false;
-      services.openssh.hostKeys = [{ path = "/etc/ssh/${hostName}"; type = "ssh-ed25519"; }];
+      services.openssh.hostKeys = [
+        {
+          path = "/etc/ssh/${hostName}";
+          type = "ssh-ed25519"; 
+        }
+      ];
+      sops.age.sshKeyPaths = [ "/etc/ssh/${hostName}" ];
       environment.systemPackages = with pkgs; [
         nix-output-monitor
         vim