build(deps): Bump @docusaurus/core from 2.0.0-beta.15 to 2.0.0-beta.18

Bumps [@docusaurus/core](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus) from 2.0.0-beta.15 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
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -12,7 +12,7 @@
     "i18n": "docusaurus write-translations"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-beta.15",
+    "@docusaurus/core": "2.0.0-beta.18",
     "@docusaurus/preset-classic": "2.0.0-beta.14",
     "@mdx-js/react": "^1.6.22",
     "axios": "^0.26.1",