Updating root stack adding "notificationARNs" property to child stack does not behave as expected - update ignores this and the property is not applied to the child stack

### Name of the resource

AWS::CloudFormation::Stack

### Resource Name

_No response_

### Issue Description

Bug in cloudformation:

Updating root stack adding "notificationARNs" property to child stack does not behave as expected - update ignores this and the property is not applied to the child stack

Seems like the workaround right now is to manually make an out-of-band change to the child stack directly - updating the notificationARNs property that way

### Expected Behavior

updating the root stack will cause the property to be reflected in the child stack

### Observed Behavior

notificationARNs not reflected in child stack at all

### Test Cases

1. Create root stack with child stack
2. update root stack by adding notificationARNs property to child stack in template
3. can observe that the update does not do what is intended - notificationARNs property not updated.

### Other Details

_No response_

Reproduce the issue with a root stack and child stack, then update the root template by adding the notificationARNs property to the child stack. Compare the child stack's notificationARNs before and after the update. Done means the property is reflected in the child stack without an out-of-band change.

Written by the indexing model from the issue text.