Bump azure-core from 1.36.0 to 1.38.0 in /agentic_ai/applications

Bumps [azure-core](https://github.com/Azure/azure-sdk-for-python) from 1.36.0 to 1.38.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Commits](Azure/azure-sdk-for-python@azure-core_1.36.0...azure-core_1.38.0)

---
updated-dependencies:
- dependency-name: azure-core
  dependency-version: 1.38.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

agentic_ai/applications/requirements.txt

@@ -105,7 +105,7 @@ azure-ai-projects==2.0.0b2
     #   agent-framework-azure-ai
 azure-common==1.1.28
     # via azure-search-documents
-azure-core==1.36.0
+azure-core==1.38.0
     # via
     #   agent-framework-purview
     #   azure-ai-agents