chore: Bump aws-cdk-lib from 2.88.0 to 2.91.0 in /cdkworkshop.com

Bumps [aws-cdk-lib](https://github.com/aws/aws-cdk/tree/HEAD/packages/aws-cdk-lib) from 2.88.0 to 2.91.0.
- [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/v2.91.0/packages/aws-cdk-lib)

---
updated-dependencies:
- dependency-name: aws-cdk-lib
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

cdkworkshop.com/package.json

@@ -29,7 +29,7 @@
         "type": "git"
     },
     "dependencies": {
-        "aws-cdk-lib": "^2.88.0",
+        "aws-cdk-lib": "^2.91.0",
         "constructs": "^10.2.69"
     },
     "engines": {