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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-6144788

package.json

@@ -14,10 +14,10 @@
     "write-heading-ids": "docusaurus write-heading-ids docs"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.4.1",
+    "@docusaurus/core": "^3.0.0",
     "@docusaurus/plugin-google-gtag": "^2.4.1",
     "@docusaurus/plugin-sitemap": "^2.4.1",
-    "@docusaurus/preset-classic": "^2.4.1",
+    "@docusaurus/preset-classic": "^3.0.0",
     "@mdx-js/react": "^1.6.22",
     "clsx": "^1.1.1",
     "prism-react-renderer": "^1.3.1",