fix: website/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-CROSSSPAWN-8303230
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116

Author: snyk-bot

website/package.json

@@ -7,8 +7,8 @@
   },
   "dependencies": {
     "@dipakparmar/docusaurus-plugin-umami": "^2.0.6",
-    "@docusaurus/core": "2.2.0",
-    "@docusaurus/preset-classic": "2.2.0",
+    "@docusaurus/core": "3.8.0",
+    "@docusaurus/preset-classic": "3.8.0",
     "classnames": "^2.2.6",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",