Bump langchain from 0.1.36 to 0.3.7

Bumps [langchain](https://github.com/langchain-ai/langchainjs) from 0.1.36 to 0.3.7.
- [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@0.1.36...0.3.7)

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

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

Author: dependabot[bot]

examples/next-langchain/package.json

@@ -13,7 +13,7 @@
     "@langchain/openai": "0.0.28",
     "@langchain/core": "0.1.63",
     "ai": "4.0.18",
-    "langchain": "0.1.36",
+    "langchain": "0.3.7",
     "next": "latest",
     "react": "^18",
     "react-dom": "^18"