Bump langchain-core in /deployment/deploy-devops-ai-assistant

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 0.2.43 to 0.3.81.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==0.2.43...langchain-core==0.3.81)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 0.3.81
  dependency-type: direct:production
...

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

Author: dependabot[bot]

deployment/deploy-devops-ai-assistant/requirements.txt

@@ -5,7 +5,7 @@ streamlit==1.37.1
 langchain==0.2.17
 langchain-aws==0.1.17
 langchain-community==0.3.27
-langchain-core==0.2.43
+langchain-core==0.3.81
 langchain-text-splitters==0.2.4
 langchainhub==0.1.21
 langsmith==0.1.129