chore(deps): bump aws-cdk-lib in /samples/sagemaker_custom_endpoint

Bumps [aws-cdk-lib](https://github.com/aws/aws-cdk/tree/HEAD/packages/aws-cdk-lib) from 2.154.1 to 2.178.0.
- [Release notes](https://github.com/aws/aws-cdk/releases)
- [Changelog](https://github.com/aws/aws-cdk/blob/main/CHANGELOG.v2.md)
- [Commits](https://github.com/aws/aws-cdk/commits/v2.178.0/packages/aws-cdk-lib)

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

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Author: dependabot[bot]