DWriteCore generates errors for SemiBold font weight for some fonts

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### Describe the bug

This issue was independently discovered by [me](https://github.com/microsoft/microsoft-ui-xaml/issues/10169) and [him](https://github.com/microsoft/microsoft-ui-xaml/issues/10105), and it is caused by changes in the way DWriteCore is used starting from WinUI3 1.6. In other words, this issue has always existed in DWriteCore, but WinUI3 1.6 exposed it. WinUI3 1.6 added the following code: https://github.com/microsoft/microsoft-ui-xaml/blob/winui3/release/1.6.0/src/dxaml/xcp/pal/win/DWriteFontFamily.cpp#L50-L75

### Steps to reproduce the bug

Set the font of the TextBlock to Microsoft Yahei UI (requires Chinese language pack), and set the width to SemiBold.

### Expected behavior

The text appears thicker than normal.

### Screenshots

_No response_

### NuGet package version

None

### Packaging type

Packaged (MSIX)

### Windows version

_No response_

### IDE

_No response_

### Additional context

_No response_

Start with the linked DWriteFontFamily.cpp section at lines 50-75 and reproduce the issue using a TextBlock set to Microsoft Yahei UI with SemiBold weight. Investigate the DWriteCore behavior exposed by that usage and verify the fix by confirming the font renders thicker than normal without generating errors.

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