Heimdall Dashboard: Fix missing logo on website (#3227)

* Update Heimdall logo

* take it from master branch

Author: tremor021

frontend/public/json/heimdall-dashboard.json

@@ -11,7 +11,7 @@
     "interface_port": 7990,
     "documentation": null,
     "website": "https://heimdall.site/",
-    "logo": "https://github.com/community-scripts/ProxmoxVE/blob/main/misc/images/heimdall.png?raw=true",
+    "logo": "https://raw.githubusercontent.com/linuxserver/Heimdall/refs/heads/master/public/img/heimdall-logo.svg",
     "description": "Heimdall Dashboard is a self-hosted, web-based dashboard for managing and monitoring the health of applications and servers. It allows you to keep track of the status of your systems from a single, centralized location, and receive notifications when things go wrong. With Heimdall Dashboard, you have full control over your data and can customize it to meet your specific needs. Self-hosting the dashboard gives you the flexibility to run it on your own infrastructure, making it a suitable solution for organizations that prioritize data security and privacy.",
     "install_methods": [
         {