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/debian-13-vm.json

@@ -11,7 +11,7 @@
   "interface_port": null,
   "documentation": null,
   "website": "https://www.debian.org/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/debian.webp",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@master/webp/debian.webp",
   "config_path": "",
   "description": "Debian 13 (Trixie) Linux is a distribution that emphasizes free software. It supports many hardware platforms",
   "install_methods": [
@@ -40,7 +40,7 @@
       "text": "After installation, checkout: ´https://github.com/community-scripts/ProxmoxVE/discussions/836´ for useful Debian commands",
       "type": "info"
     },
-	{
+    {
       "text": "If you use Cloud-init, checkout after installation: ´https://github.com/community-scripts/ProxmoxVE/discussions/272´",
       "type": "info"
     }