Bump zod from 4.1.1 to 4.1.5 in /src/Elastic.Documentation.Site (#1808)

Bumps [zod](https://github.com/colinhacks/zod) from 4.1.1 to 4.1.5.
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v4.1.1...v4.1.5)

---
updated-dependencies:
- dependency-name: zod
  dependency-version: 4.1.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

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

@@ -87,7 +87,7 @@
     "tippy.js": "6.3.7",
     "ua-parser-js": "2.0.4",
     "uuid": "11.1.0",
-    "zod": "4.1.1",
+    "zod": "4.1.5",
     "zustand": "5.0.8"
   }
 }