Bump @aws-cdk/assert from 1.97.0 to 2.68.0 (#8)

Bumps [@aws-cdk/assert](https://github.com/aws/aws-cdk/tree/HEAD/packages/@aws-cdk/assert) from 1.97.0 to 2.68.0.
- [Release notes](https://github.com/aws/aws-cdk/releases)
- [Changelog](https://github.com/aws/aws-cdk/blob/v2.68.0/CHANGELOG.v2.md)
- [Commits](https://github.com/aws/aws-cdk/commits/v2.68.0/packages/@aws-cdk/assert)

---
updated-dependencies:
- dependency-name: "@aws-cdk/assert"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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