Ghostfolio widget not working anymore

### Widget link

https://github.com/glanceapp/community-widgets/tree/main/widgets/ghostfolio-stats

### Description

Since the change in the Ghostfolio API, needing an Authorization: Bearer Token in the header, the widget is not working.

Start in widgets/ghostfolio-stats and review how it currently requests Ghostfolio data, then check the API change described in the issue. Done means the widget authenticates with the required Bearer token and works again; verify its displayed statistics using the project’s available checks.

Written by the indexing model from the issue text.