Bump SkiaSharp from 2.88.2 to 2.88.3 in /src.csharp (#1010)

Bumps [SkiaSharp](https://github.com/mono/SkiaSharp) from 2.88.2 to 2.88.3.
- [Release notes](https://github.com/mono/SkiaSharp/releases)
- [Commits](mono/SkiaSharp@v2.88.2...v2.88.3)

---
updated-dependencies:
- dependency-name: SkiaSharp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src.csharp/AlphaTab/AlphaTab.csproj

@@ -25,7 +25,7 @@
 
     <ItemGroup>
       <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-      <PackageReference Include="SkiaSharp" Version="2.88.2" />
+      <PackageReference Include="SkiaSharp" Version="2.88.3" />
       <PackageReference Include="SkiaSharp.HarfBuzz" Version="2.88.2" />
       <PackageReference Include="System.Drawing.Common" Version="6.0.0" />
     </ItemGroup>