Fix normalize-url vulnerability (#16375)

Update two packages that used a highly vulnerable version of normalize-url

See facebook/create-react-app#11054

Author: bbovenzi

airflow/www/package.json

@@ -44,9 +44,9 @@
     "eslint-plugin-standard": "^4.0.1",
     "file-loader": "^6.0.0",
     "imports-loader": "^1.1.0",
-    "mini-css-extract-plugin": "0.9.0",
+    "mini-css-extract-plugin": "1.6.0",
     "moment-locales-webpack-plugin": "^1.2.0",
-    "optimize-css-assets-webpack-plugin": "^5.0.4",
+    "optimize-css-assets-webpack-plugin": "6.0.0",
     "style-loader": "^1.2.1",
     "stylelint": "^13.6.1",
     "stylelint-config-standard": "^20.0.0",