Modified .NET 9+ QuickGrid rendering behavior is not documented as a breaking change

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

In .NET 9, the behavior of the QuickGrid changed: When using a paginator, empty rows are now rendered differently than before. See https://github.com/dotnet/aspnetcore/issues/57199 for details.

Depending on the CSS used to style the QuickGrid, this means that your web application might have looked OK in .NET < 9, but no longer looks OK after you upgrade to .NET 9+.

This can be fixed by modifying your style sheet. Still, this is, by definition, a "breaking change". As such, it should be documented in the [list of ASP.NET Core 9.0 breaking changes](https://learn.microsoft.com/en-us/dotnet/core/compatibility/9.0#aspnet-core)

### Expected Behavior

I expect the [list of ASP.NET Core 9.0 breaking changes](https://learn.microsoft.com/en-us/dotnet/core/compatibility/9.0#aspnet-core) to document this change in behavior.

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

_No response_