Bump langchain-core in /LLM/rag in the pip group across 1 directory (#303)

Bumps the pip group with 1 update in the /LLM/rag directory: [langchain-core](https://github.com/langchain-ai/langchain).


Updates `langchain-core` from 0.3.56 to 0.3.80
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==0.3.56...langchain-core==0.3.80)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 0.3.80
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

LLM/rag/requirements.txt

@@ -1,6 +1,6 @@
 langchain==0.3.27
 langchain-community==0.3.27
-langchain-core==0.3.72
+langchain-core==0.3.80
 langchain-huggingface==0.1.2
 huggingface-hub>=0.30.0
 sentence-transformers==3.4.1