Bump the eui group across 1 directory with 2 updates

Bumps the eui group with 2 updates in the /src/Elastic.Documentation.Site directory: [@elastic/eui](https://github.com/elastic/eui) and [@elastic/eui-theme-borealis](https://github.com/elastic/eui/tree/HEAD/packages/eui-theme-borealis).


Updates `@elastic/eui` from 104.1.0 to 105.0.0
- [Release notes](https://github.com/elastic/eui/releases)
- [Commits](elastic/eui@v104.1.0...v105.0.0)

Updates `@elastic/eui-theme-borealis` from 3.1.0 to 3.2.0
- [Release notes](https://github.com/elastic/eui/releases)
- [Commits](https://github.com/elastic/eui/commits/v3.2.0/packages/eui-theme-borealis)

---
updated-dependencies:
- dependency-name: "@elastic/eui"
  dependency-version: 105.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: eui
- dependency-name: "@elastic/eui-theme-borealis"
  dependency-version: 3.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: eui
...

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

Author: dependabot[bot]

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

@@ -32,8 +32,8 @@
   "private": true,
   "devDependencies": {
     "@elastic/datemath": "5.0.3",
-    "@elastic/eui": "104.1.0",
-    "@elastic/eui-theme-borealis": "3.1.0",
+    "@elastic/eui": "105.0.0",
+    "@elastic/eui-theme-borealis": "3.2.0",
     "@emotion/css": "11.13.5",
     "@emotion/react": "11.14.0",
     "@eslint/js": "9.30.1",