CHANGELOG.v2.md file getting too big to view on GitHub

### Describe the bug

### Expected Behavior

Expect to be able to view the formatted markdown content.

### Current Behavior

GitHub says "This blob took too long to generate."

### Reproduction Steps

Click on this [link](https://github.com/aws/aws-cdk/blob/main/CHANGELOG.v2.md).

### Possible Solution

Maybe prune the file of older version info, or split it into multiple parts.

### Additional Information/Context

_No response_

### CDK CLI Version

2.79.1 (build 2e7f8b7)

### Framework Version

_No response_

### Node.js Version

v18.13.0

### OS

Windows 10

### Language

Python

### Language Version

Python 3.9.13

### Other information

_No response_

Start by opening CHANGELOG.v2.md from the linked GitHub page and confirm the rendering failure. Decide whether pruning older version information or splitting the changelog is appropriate, then make the formatted history viewable on GitHub and verify the resulting files render successfully.

Written by the indexing model from the issue text.