fix(docs): update figma link

Author: simonprovost

docs/BRANDING.md

@@ -8,7 +8,7 @@ MCPStack is a free and open-source project that values consistency in both its v
 To maintain a consistent visual identity, all branding designs for MCPStack were created using Figma. These designs are available below for interactive visualization.
 
 <div>
-<iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="800" height="450" src="https://www.figma.com/design/cJN85ls2G60j8kHeNkEQyx/MCPStack?node-id=0-1&t=dSmD5t8lIuq3sIEa-1" allowfullscreen></iframe>
+<iframe style="border: 1px solid rgba(0, 0, 0, 0.1);" width="800" height="450" src="https://embed.figma.com/design/cJN85ls2G60j8kHeNkEQyx/MCPStack?node-id=0-1&embed-host=share" allowfullscreen></iframe>
 </div>
 
 ## User Experience Design