nixos/jira: set home for jira user

Some plugins rely on being able to write to the user's home directory.

nixos/modules/services/web-apps/atlassian/jira.nix

@@ -151,6 +151,7 @@ in
     users.users.${cfg.user} = {
       isSystemUser = true;
       group = cfg.group;
+      home = cfg.home;
     };
 
     users.groups.${cfg.group} = {};