Fix webpack 5 CLI args in yarn start in website

website/package.json

@@ -2,7 +2,7 @@
   "license": "MIT",
   "scripts": {
     "build": "webpack && docusaurus-build",
-    "start": "concurrently \"docusaurus-start\" \"webpack -d -w\"",
+    "start": "concurrently \"docusaurus-start\" \"webpack --mode=development --watch\"",
     "svgo": "svgo --pretty --indent=2 --config=svgo.yml",
     "svgo-all": "find static | grep '\\.svg$' | xargs -Iz -n 1 yarn svgo z",
     "update-stable-docs": "rm -rf ./versioned_docs ./versions.json && docusaurus-version stable"