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/blocky.json

@@ -11,7 +11,7 @@
   "interface_port": 4000,
   "documentation": "https://0xerr0r.github.io/blocky/latest/configuration/",
   "website": "https://0xerr0r.github.io/blocky/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/blocky.webp",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@master/webp/blocky.webp",
   "config_path": "/opt/blocky/config.yml",
   "description": "Blocky is a software tool designed for blocking unwanted ads and trackers on local networks. It functions as a DNS proxy and runs on the Go programming language. Blocky intercepts requests to advertisements and other unwanted content and blocks them before they reach the end user. This results in a cleaner, faster, and more secure online experience for users connected to the local network. Blocky is open-source, easy to configure and can be run on a variety of devices, making it a versatile solution for small to medium-sized local networks.",
   "install_methods": [