Bump jsondiffpatch and ai in /datasheetsChat

Removes [jsondiffpatch](https://github.com/benjamine/jsondiffpatch). It's no longer used after updating ancestor dependency [ai](https://github.com/vercel/ai). These dependencies need to be updated together.


Removes `jsondiffpatch`

Updates `ai` from 4.2.6 to 5.0.68
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/compare/ai@4.2.6...ai@5.0.68)

---
updated-dependencies:
- dependency-name: jsondiffpatch
  dependency-version: 
  dependency-type: indirect
- dependency-name: ai
  dependency-version: 5.0.68
  dependency-type: direct:production
...

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

Author: dependabot[bot]

datasheetsChat/package-lock.json

@@ -17,7 +17,7 @@
     "@tailwindcss/forms": "^0.5.9",
     "@tailwindcss/typography": "^0.5.15",
     "@vectorize-io/vectorize-client": "^0.2.1",
-    "ai": "^4.2.6",
+    "ai": "^5.0.68",
     "lucide-react": "^0.468.0",
     "next": "^15.4.7",
     "react": "^19.0.0",