[Skia (?Other Platforms)][Neumorphic] Painted shadow is slightly off in some cases

[agneszitte]

Current behavior

The painted shadow is slightly off in some cases on Skia (other platforms need to be tested): (chip)

notice there is a line between upper border and the hover-highlighted background

Expected behavior

How to reproduce it (as minimally and precisely as possible)

Current branch where it can be tested: https://github.com/unoplatform/Uno.Gallery/tree/dev/xygu/20230830/neumorphic-2nd-pass

Environment

Nuget Package: Uno.Toolkit

Package Version(s): https://www.nuget.org/packages/Uno.Toolkit/5.0.0-dev.94

Affected platform(s):

• [X] Skia
• [?] Other platforms need to be tested, please

[Xiaoy312]

if it wasnt clear, the red area should cover 100% the green area

for repro:

simple version(the bug is always visible)

```xml ```

visual state version (need to hover)

```xml ```

[agneszitte]

Scaling issue maybe ? @Xiaoy312 can you test other platforms when you can please?