chore(deps): bump the ai-and-llm group across 1 directory with 2 updates (#8892)

Bumps the ai-and-llm group with 2 updates in the /packages/dd-trace/test/plugins/versions directory: [@langchain/langgraph](https://github.com/langchain-ai/langgraphjs/tree/HEAD/libs/langgraph-core) and [ai](https://github.com/vercel/ai/tree/HEAD/packages/ai).


Updates `@langchain/langgraph` from 1.3.6 to 1.3.7
- [Release notes](https://github.com/langchain-ai/langgraphjs/releases)
- [Changelog](https://github.com/langchain-ai/langgraphjs/blob/main/libs/langgraph-core/CHANGELOG.md)
- [Commits](https://github.com/langchain-ai/langgraphjs/commits/@langchain/langgraph@1.3.7/libs/langgraph-core)

Updates `ai` from 6.0.197 to 6.0.198
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/ai@6.0.198/packages/ai/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/commits/ai@6.0.198/packages/ai)

---
updated-dependencies:
- dependency-name: "@langchain/langgraph"
  dependency-version: 1.3.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: ai-and-llm
- dependency-name: ai
  dependency-version: 6.0.198
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: ai-and-llm
...

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

Author: dependabot[bot]

packages/dd-trace/test/plugins/versions/package.json

@@ -57,7 +57,7 @@
     "@langchain/cohere": "1.0.5",
     "@langchain/core": "1.1.48",
     "@langchain/google-genai": "2.1.31",
-    "@langchain/langgraph": "1.3.6",
+    "@langchain/langgraph": "1.3.7",
     "@langchain/openai": "1.4.7",
     "@modelcontextprotocol/sdk": "1.29.0",
     "@nats-io/nats-core": "3.4.0",
@@ -88,7 +88,7 @@
     "@vitest/coverage-v8": "4.1.8",
     "@vitest/runner": "4.1.8",
     "aerospike": "6.7.0",
-    "ai": "6.0.197",
+    "ai": "6.0.198",
     "amqp10": "3.6.0",
     "amqplib": "2.0.1",
     "apollo-server-core": "3.13.0",