SSM Document does not allow latest runtime versions

[PedroMVM]

I updated some SSM Documents to use latest Python runtime 3.13, but an error returned:

Resource handler returned message: "Invalid request provided: Input python3.13 failed to match regex defined in document: python3.6|python3.7|python3.8|python3.9|python3.10|python3.11|PowerShell Core 6.0|PowerShell 7.0|PowerShell 8.0.

The latest runtime version available for SSM Documents is 3.11. Lambda functions can use Python 3.13, while SSM Documents cannot, which is strange. Can someone look on it?