fix: host font assets from root (#7548)

vercel.json

@@ -28,18 +28,6 @@
       "source": "/webex/:match*",
       "destination": "https://for-webex.excalidraw.com"
     },
-    {
-      "source": "/Virgil.woff2",
-      "destination": "https://excalidraw.nyc3.cdn.digitaloceanspaces.com/fonts/Virgil.woff2"
-    },
-    {
-      "source": "/Cascadia.woff2",
-      "destination": "https://excalidraw.nyc3.cdn.digitaloceanspaces.com/fonts/Cascadia.woff2"
-    },
-    {
-      "source": "/Assistant-Regular.woff2",
-      "destination": "https://excalidraw.nyc3.cdn.digitaloceanspaces.com/fonts/Assistant-Regular.woff2"
-    },
     {
       "source": "/:path*",
       "has": [