Implement [Release note figures as vignettes](https://github.com/cdk/cdk/releases). - [2.9 Release Notes](https://github.com/cdk/cdk/releases/tag/cdk-2.9) - [2.8 Release Notes](https://github.com/cdk/cdk/releases/tag/cdk-2.8) - [2.5 Release Notes](https://github.com/cdk/cdk/wiki/2.5-Release-Notes) - [2.4 Release Notes](https://github.com/cdk/cdk/wiki/2.3-Release-Notes) - [2.2 Release Notes](https://github.com/cdk/cdk/wiki/2.2-Release-Notes)
