build(deps): Bump langchain

Bumps the npm-dependencies group with 1 update in the /actions/release/summarize-changelog directory: [langchain](https://github.com/langchain-ai/langchainjs).


Updates `langchain` from 1.4.2 to 1.4.4
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Commits](https://github.com/langchain-ai/langchainjs/compare/langchain@1.4.2...@langchain/openai@1.4.4)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 1.4.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
...

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

Author: dependabot[bot]

actions/release/summarize-changelog/package-lock.json

@@ -23,7 +23,7 @@
     "@langchain/google-genai": "2.1.31",
     "@langchain/openai": "1.4.7",
     "html-to-text": "^10.0.0",
-    "langchain": "1.4.2"
+    "langchain": "1.4.4"
   },
   "engines": {
     "node": ">=24.0.0"