Bump langchain-core from 0.2.10 to 0.2.12

Bumps [langchain-core](https://github.com/langchain-ai/langchain) from 0.2.10 to 0.2.12.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==0.2.10...langchain-core==0.2.12)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/requirements.txt

@@ -63,7 +63,7 @@ jsonpointer==3.0.0
     # via jsonpatch
 langchain-anthropic==0.1.17
     # via -r requirements/requirements.in
-langchain-core==0.2.10
+langchain-core==0.2.12
     # via
     #   -r requirements/requirements.in
     #   langchain-anthropic