Bump @docusaurus/core from 3.8.1 to 3.9.1 in /website

Bumps [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus) from 3.8.1 to 3.9.1.
- [Release notes](https://github.com/facebook/docusaurus/releases)
- [Changelog](https://github.com/facebook/docusaurus/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/docusaurus/commits/v3.9.1/packages/docusaurus)

---
updated-dependencies:
- dependency-name: "@docusaurus/core"
  dependency-version: 3.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

website/package.json

@@ -15,7 +15,7 @@
     "typecheck": "tsc"
   },
   "dependencies": {
-    "@docusaurus/core": "3.8.1",
+    "@docusaurus/core": "3.9.1",
     "@docusaurus/preset-classic": "3.8.1",
     "@easyops-cn/docusaurus-search-local": "^0.52.1",
     "@mdx-js/react": "^3.1.1",