fix: docusaurus/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-9403194

Author: snyk-bot

docusaurus/package.json

@@ -15,8 +15,8 @@
     "npm-upgrade": "yarn upgrade --latest"
   },
   "dependencies": {
-    "@docusaurus/core": "2.3.1",
-    "@docusaurus/preset-classic": "2.3.1",
+    "@docusaurus/core": "3.0.1",
+    "@docusaurus/preset-classic": "3.0.1",
     "@mdx-js/react": "^1.6.22",
     "clsx": "^1.2.1",
     "docusaurus-plugin-sass": "^0.2.2",