chore: bump @docusaurus/core in /website (#1704)

Bumps [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus) from 2.0.0-beta.17 to 2.0.0-beta.18.
- [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/v2.0.0-beta.18/packages/docusaurus)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

website/package.json

@@ -16,8 +16,8 @@
   },
   "dependencies": {
     "@cmfcmf/docusaurus-search-local": "^0.10.0",
-    "@docusaurus/core": "^2.0.0-beta.17",
-    "@docusaurus/preset-classic": "^2.0.0-beta.17",
+    "@docusaurus/core": "^2.0.0-beta.18",
+    "@docusaurus/preset-classic": "^2.0.0-beta.18",
     "@mdx-js/react": "^1.6.21",
     "clsx": "^1.1.1",
     "mdx-mermaid": "^1.2.2",
@@ -27,7 +27,7 @@
     "react-dom": "^17.0.2"
   },
   "devDependencies": {
-    "@docusaurus/module-type-aliases": "2.0.0-beta.17",
+    "@docusaurus/module-type-aliases": "2.0.0-beta.18",
     "@tsconfig/docusaurus": "^1.0.5",
     "@types/node": "^17.0.23",
     "typescript": "^4.6.3"