build(deps): bump langchain-core

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 0.3.80 to 0.3.81.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==0.3.80...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] <support@github.com>

Author: dependabot[bot]

ai/generative-ai-service/document-processing-with-genai/doc-understanding-and-genAI/files/requirements.txt

@@ -9,7 +9,7 @@ oci==2.155.2
 oci-cli==3.62.2                  
 
 langchain==0.3.26                
-langchain-core==0.3.80           
+langchain-core==0.3.81           
 langchain-community==0.2.19      
 
 # Additional dependencies