chore(deps): bump the langchain group with 3 updates (#1038)

Bumps the langchain group with 3 updates: [@langchain/community](https://github.com/langchain-ai/langchainjs), [@langchain/core](https://github.com/langchain-ai/langchainjs) and [langchain](https://github.com/langchain-ai/langchainjs).


Updates `@langchain/community` from 0.3.8 to 0.3.9
- [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 0.3.13 to 0.3.15
- [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` from 0.3.3 to 0.3.4
- [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@0.3.3...0.3.4)

---
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
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: langchain
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -33,8 +33,8 @@
     "@fortawesome/free-brands-svg-icons": "6.6.0",
     "@fortawesome/free-solid-svg-icons": "6.6.0",
     "@fortawesome/react-fontawesome": "0.2.2",
-    "@langchain/community": "0.3.8",
-    "@langchain/core": "0.3.13",
+    "@langchain/community": "0.3.9",
+    "@langchain/core": "0.3.15",
     "@langchain/openai": "0.3.11",
     "@million/lint": "1.0.11",
     "ai": "3.4.18",
@@ -48,7 +48,7 @@
     "gpt-tokenizer": "2.5.1",
     "he": "1.2.0",
     "jotai": "2.10.1",
-    "langchain": "0.3.3",
+    "langchain": "0.3.4",
     "markdown-to-txt": "2.0.1",
     "nanoid": "5.0.7",
     "next": "15.0.1",