Bump aws-cdk-lib in /build-tests-samples/heft-serverless-stack-tutorial

Bumps [aws-cdk-lib](https://github.com/aws/aws-cdk/tree/HEAD/packages/aws-cdk-lib) from 2.189.1 to 2.260.0.
- [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/v2.260.0/packages/aws-cdk-lib)

---
updated-dependencies:
- dependency-name: aws-cdk-lib
  dependency-version: 2.260.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

build-tests-samples/heft-serverless-stack-tutorial/package.json

@@ -26,7 +26,7 @@
     "@types/aws-lambda": "8.10.93",
     "@types/jest": "30.0.0",
     "@types/node": "20.17.19",
-    "aws-cdk-lib": "2.189.1",
+    "aws-cdk-lib": "2.260.0",
     "constructs": "~10.0.98",
     "eslint": "~9.37.0",
     "local-eslint-config": "workspace:*",