[dev] update version from 2.3.1 to 2.4.0

Author: serhiipylypchuk1991

package.json

@@ -13,8 +13,8 @@
     "normalizeLink": "cd plugins && node samplesLinksNormalize.js"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.3.1",
-    "@docusaurus/preset-classic": "^2.3.1",
+    "@docusaurus/core": "^2.4.0",
+    "@docusaurus/preset-classic": "^2.4.0",
     "@easyops-cn/docusaurus-search-local": "^0.26.1",
     "@mdx-js/react": "^1.5.8",
     "clsx": "^1.1.1",