build(deps): bump amplitude-js from 8.17.0 to 8.18.0 in /website

Bumps [amplitude-js](https://github.com/amplitude/amplitude-javascript) from 8.17.0 to 8.18.0.
- [Release notes](https://github.com/amplitude/amplitude-javascript/releases)
- [Changelog](https://github.com/amplitude/Amplitude-JavaScript/blob/main/CHANGELOG.md)
- [Commits](https://github.com/amplitude/amplitude-javascript/compare/v8.17.0...v8.18.0)

---
updated-dependencies:
- dependency-name: amplitude-js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

website/package.json

@@ -20,7 +20,7 @@
     "@docusaurus/preset-classic": "^2.0.0-beta.18",
     "@mdx-js/react": "^1.6.22",
     "@svgr/webpack": "^6.2.1",
-    "amplitude-js": "^8.17.0",
+    "amplitude-js": "^8.18.0",
     "clsx": "^1.1.1",
     "docusaurus-plugin-sass": "^0.2.2",
     "docusaurus2-dotenv": "^1.4.0",