Custom application icon not showing on uploaded images #4030

Describe the Bug

I set a custom application icon with the new setting. For most sites the icon is used as the favicon. But when I open an image in an new tab it will use the default bookstack favicon.
It seems like that /uploads doesn't use the custom application icon.

Steps to Reproduce

1. Set custom application icon
2. Open any site with a image in the text
3. Click on that image
4. In the new tab the favicon should be the default bookstack icon

Expected Behaviour

The custom application icon should be used as the favicon.

Screenshots or Additional Context

No response

Browser Details

No response

Exact BookStack Version

v23.01.1

PHP Version

8.2

Hosting Environment

Installed on AlmaLinux 9, Apache httpd as webserver