Bump langchain-core in /ai/gen-ai-agents/assistant-secretary-agent/files

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 1.2.28 to 1.3.3.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==1.2.28...langchain-core==1.3.3)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 1.3.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ai/gen-ai-agents/assistant-secretary-agent/files/local_requirements.txt

@@ -34,7 +34,7 @@ jsonschema==4.23.0
 jsonschema-specifications==2024.10.1
 langchain==0.3.14
 langchain-community==0.3.14
-langchain-core==1.2.28
+langchain-core==1.3.3
 langchain-experimental==0.3.4
 langchain-text-splitters==0.3.9
 langgraph==0.2.62