Bump langchain-core from 1.2.20 to 1.3.3

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 1.2.20 to 1.3.3.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==1.2.20...langchain-core==1.3.3)

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

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

Author: dependabot[bot]