chore(deps): bump aws-cdk-lib in /samples/llm-on-govcloud-sagemaker

Bumps [aws-cdk-lib](https://github.com/aws/aws-cdk/tree/HEAD/packages/aws-cdk-lib) from 2.185.0 to 2.187.0.
- [Release notes](https://github.com/aws/aws-cdk/releases)
- [Changelog](https://github.com/aws/aws-cdk/blob/main/CHANGELOG.v2.alpha.md)
- [Commits](https://github.com/aws/aws-cdk/commits/v2.187.0/packages/aws-cdk-lib)

---
updated-dependencies:
- dependency-name: aws-cdk-lib
  dependency-version: 2.187.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

samples/llm-on-govcloud-sagemaker/package-lock.json

@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@cdklabs/generative-ai-cdk-constructs": "^0.1.68",
-    "aws-cdk-lib": "^2.185.0",
+    "aws-cdk-lib": "^2.187.0",
     "cdk-nag": "^2.27.215",
     "constructs": "^10.0.0",
     "source-map-support": "^0.5.21"