chore(deps-dev): bump jsii from 5.6.20 to 5.6.21

Bumps [jsii](https://github.com/aws/jsii-compiler) from 5.6.20 to 5.6.21.
- [Release notes](https://github.com/aws/jsii-compiler/releases)
- [Changelog](https://github.com/aws/jsii-compiler/blob/main/releases.json)
- [Commits](aws/jsii-compiler@v5.6.20...v5.6.21)

---
updated-dependencies:
- dependency-name: jsii
  dependency-version: 5.6.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]