Dependency Updates: Bump the langchain group across 1 directory with …

…5 updates

Bumps the langchain group with 4 updates in the / directory: [@langchain/community](https://github.com/langchain-ai/langchainjs), [@langchain/google-genai](https://github.com/langchain-ai/langchainjs), [@langchain/openai](https://github.com/langchain-ai/langchainjs) and [langchain](https://github.com/langchain-ai/langchainjs).


Updates `@langchain/community` from 0.2.18 to 0.2.20
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Changelog](https://github.com/langchain-ai/langchainjs/blob/main/release_workspace.js)
- [Commits](https://github.com/langchain-ai/langchainjs/commits)

Updates `@langchain/core` from 0.2.15 to 0.2.18
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Changelog](https://github.com/langchain-ai/langchainjs/blob/main/release_workspace.js)
- [Commits](https://github.com/langchain-ai/langchainjs/commits)

Updates `@langchain/google-genai` from 0.0.21 to 0.0.23
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Changelog](https://github.com/langchain-ai/langchainjs/blob/main/release_workspace.js)
- [Commits](https://github.com/langchain-ai/langchainjs/commits)

Updates `@langchain/openai` from 0.2.1 to 0.2.4
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Changelog](https://github.com/langchain-ai/langchainjs/blob/main/release_workspace.js)
- [Commits](langchain-ai/langchainjs@0.2.1...0.2.4)

Updates `langchain` from 0.2.9 to 0.2.10
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Changelog](https://github.com/langchain-ai/langchainjs/blob/main/release_workspace.js)
- [Commits](langchain-ai/langchainjs@0.2.9...0.2.10)

---
updated-dependencies:
- dependency-name: "@langchain/community"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
- dependency-name: "@langchain/core"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
- dependency-name: "@langchain/google-genai"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
- dependency-name: "@langchain/openai"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
- dependency-name: langchain
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
...

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