Bump langchain-core in the uv group across 1 directory

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


Updates `langchain-core` from 1.2.9 to 1.2.11
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==1.2.9...langchain-core==1.2.11)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 1.2.11
  dependency-type: indirect
  dependency-group: uv
...

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Author: dependabot[bot]