fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-6124857

Author: snyk-bot

package.json

@@ -15,8 +15,8 @@
     "typecheck": "tsc"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.3.1",
-    "@docusaurus/preset-classic": "^2.3.1",
+    "@docusaurus/core": "^3.0.1",
+    "@docusaurus/preset-classic": "^3.0.1",
     "@giscus/react": "^2.2.6",
     "@mdx-js/react": "^1.6.22",
     "clsx": "^1.2.1",