Bump @elastic/eui (#2251)

Bumps the eui group with 1 update in the /src/Elastic.Documentation.Site directory: [@elastic/eui](https://github.com/elastic/eui/tree/HEAD/packages/eui).


Updates `@elastic/eui` from 108.0.0 to 109.0.0
- [Release notes](https://github.com/elastic/eui/releases)
- [Changelog](https://github.com/elastic/eui/blob/main/packages/eui/i18ntokens_changelog.json)
- [Commits](https://github.com/elastic/eui/commits/v109.0.0/packages/eui)

---
updated-dependencies:
- dependency-name: "@elastic/eui"
  dependency-version: 109.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: eui
...

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Author: dependabot[bot]

src/Elastic.Documentation.Site/package-lock.json

@@ -82,7 +82,7 @@
     "defaults"
   ],
   "dependencies": {
-    "@elastic/eui": "108.0.0",
+    "@elastic/eui": "109.0.0",
     "@elastic/highlightjs-esql": "1.2.0",
     "@emotion/css": "11.13.5",
     "@emotion/react": "11.14.0",