fix: docs/package.json & docs/yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-TRIM-1017038

Author: snyk-bot

docs/package.json

@@ -15,8 +15,8 @@
     "typecheck": "tsc"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.4.0",
-    "@docusaurus/preset-classic": "^2.4.0",
+    "@docusaurus/core": "^3.0.0",
+    "@docusaurus/preset-classic": "^3.0.0",
     "@mdx-js/react": "^1.6.21",
     "@svgr/webpack": "^6.3.1",
     "clsx": "^1.2.1",