fix(deps): update dependency @docusaurus/core to v2.0.0-alpha.66

Author: renovate-bot

documentation/package.json

@@ -9,7 +9,7 @@
     "deploy": "docusaurus deploy"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-alpha.58",
+    "@docusaurus/core": "2.0.0-alpha.66",
     "@docusaurus/preset-classic": "2.0.0-alpha.66",
     "classnames": "2.2.6",
     "react": "17.0.1",