Default retentionDays value '730' for LogGroup is invalid

[sam-goodwin]

Create fails if you instantiate a LogGroup with the default retentionDays value of 730:

const logGroup = new logs.LogGroup(this, 'Logs', {
   logGroupName: 'my-name',
});

Error message:
Invalid retention value. Valid values are: [1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, 3653]

It should be set to 731.