chore(website): upgrade allotment

Author: johnwalley

website/package-lock.json

@@ -21,7 +21,7 @@
     "@mdx-js/react": "3.1.0",
     "@svgr/webpack": "8.1.0",
     "@vscode/codicons": "^0.0.36",
-    "allotment": "^1.20.3",
+    "allotment": "^1.20.4",
     "clsx": "^2.0.0",
     "file-loader": "6.2.0",
     "prism-react-renderer": "1.3.5",