update selfhst icon-URLs to use @master path (#9543)

* update selfhst icon-URLs to use @master path

Changed all icon URLs in JSON files from 'cdn.jsdelivr.net/gh/selfhst/icons/webp/' to 'cdn.jsdelivr.net/gh/selfhst/icons@master/webp/' for consistency and to ensure the latest icons are referenced.

* added missing icons

frontend/public/json/jellyfin.json

@@ -11,7 +11,7 @@
   "interface_port": 8096,
   "documentation": "https://jellyfin.org/docs/",
   "website": "https://jellyfin.org/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/jellyfin.webp",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@master/webp/jellyfin.webp",
   "config_path": "/etc/jellyfin/",
   "description": "Jellyfin is a free and open-source media server and suite of multimedia applications designed to organize, manage, and share digital media files to networked devices.",
   "install_methods": [
@@ -40,7 +40,7 @@
       "text": "FFmpeg path: /usr/lib/jellyfin-ffmpeg/ffmpeg",
       "type": "info"
     },
-     {
+    {
       "text": "For NVIDIA graphics cards, you'll need to install the same drivers in the container that you did on the host. In the container, run the driver installation script and add the CLI arg --no-kernel-module",
       "type": "info"
     }