Fix bug in Admin::ProjectsController

This avoids the following error when visiting /admin/projects in
development:

    undefined method `host=' for
      #<ActiveStorage::Current:0x00007fdbbf782d80 @attributes={}>

This method was deprecated in Rails 7.0[1] and removed in Rails 7.1[2].

We might also be able to use `ActiveStorage::SetCurrent`[3] here but
I've gone for the smallest change that appears to work in development.

[1]: https://github.com/rails/rails/blob/7-0-stable/activestorage/CHANGELOG.md
[2]: https://github.com/rails/rails/blob/7-1-stable/activestorage/CHANGELOG.md
[3]: https://api.rubyonrails.org/classes/ActiveStorage/SetCurrent.html

Author: chrisroos

app/controllers/admin/projects_controller.rb

@@ -17,7 +17,9 @@ def destroy_image
     private
 
     def set_host_for_local_storage
-      ActiveStorage::Current.host = request.base_url if Rails.application.config.active_storage.service == :local
+      return unless Rails.application.config.active_storage.service == :local
+
+      ActiveStorage::Current.url_options = { host: request.base_url }
     end
   end
 end