Bump azure-identity in /End_to_end_Solutions/AOAISearchDemo/notebooks

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-python) from 1.12.0 to 1.16.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/esrp_release.md)
- [Commits](Azure/azure-sdk-for-python@azure-identity_1.12.0...azure-identity_1.16.1)

---
updated-dependencies:
- dependency-name: azure-identity
  dependency-type: direct:production
...

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

End_to_end_Solutions/AOAISearchDemo/notebooks/requirements.txt

@@ -1,4 +1,4 @@
-azure-identity==1.12.0
+azure-identity==1.16.1
 langchain==0.2.10
 openai==0.26.4
 azure-search-documents==11.4.0b3