Bump langchain-mistralai from 0.2.12 to 1.0.0

Bumps [langchain-mistralai](https://github.com/langchain-ai/langchain) from 0.2.12 to 1.0.0.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-mistralai==0.2.12...langchain-mistralai==1.0.0)

---
updated-dependencies:
- dependency-name: langchain-mistralai
  dependency-version: 1.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@ langchain==0.3.27
 langchain-anthropic==0.3.22
 langchain-community==0.3.31
 langchain-google-genai==2.1.12
-langchain-mistralai==0.2.12
+langchain-mistralai==1.0.0
 langchain-openai==0.3.33
 langgraph==0.6.10
 libmozdata==0.2.12