chore(deps): Bump langchain from 0.3.6 to 0.3.7

Bumps [langchain](https://github.com/langchain-ai/langchainjs) from 0.3.6 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@0.3.6...0.3.7)

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

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

sample-code/package.json

@@ -27,7 +27,7 @@
     "@sap-ai-sdk/foundation-models": "workspace:^",
     "@sap-ai-sdk/orchestration": "workspace:^",
     "@sap-ai-sdk/langchain": "workspace:^",
-    "langchain": "0.3.6",
+    "langchain": "0.3.7",
     "@langchain/core": "0.3.23",
     "@langchain/textsplitters": "0.1.0",
     "@sap-cloud-sdk/util": "^3.24.0",

tests/smoke-tests/package.json

@@ -18,7 +18,7 @@
     "node": "^20"
   },
   "dependencies": {
-    "langchain": "0.3.6",
+    "langchain": "0.3.7",
     "@langchain/core": "0.3.23",
     "@langchain/textsplitters": "0.1.0",
     "@sap-ai-sdk/ai-api": "canary",