Bump langchain-google-genai from 3.1.0 to 3.2.0

Bumps [langchain-google-genai](https://github.com/langchain-ai/langchain-google) from 3.1.0 to 3.2.0.
- [Release notes](https://github.com/langchain-ai/langchain-google/releases)
- [Commits](langchain-ai/langchain-google@libs/genai/v3.1.0...libs/genai/v3.2.0)

---
updated-dependencies:
- dependency-name: langchain-google-genai
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@ langchain==1.0.8
 langchain-anthropic==1.1.0
 langchain-classic==1.0.0
 langchain-community==0.4.1
-langchain-google-genai==3.1.0
+langchain-google-genai==3.2.0
 langchain-mistralai==1.0.1
 langchain-openai==1.0.3
 langgraph==1.0.3