Bump SkiaSharp from 2.88.5 to 2.88.6 in /samples/Forms/SkiaSharpDemo

Bumps [SkiaSharp](https://github.com/mono/SkiaSharp) from 2.88.5 to 2.88.6.
- [Release notes](https://github.com/mono/SkiaSharp/releases)
- [Commits](mono/SkiaSharp@v2.88.5...v2.88.6)

---
updated-dependencies:
- dependency-name: SkiaSharp
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

samples/Forms/SkiaSharpDemo/SkiaSharpDemo.csproj

@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="HarfBuzzSharp" Version="2.8.2.5" />
     <PackageReference Include="NLipsum" Version="1.1.0" />
-    <PackageReference Include="SkiaSharp" Version="2.88.5" />
+    <PackageReference Include="SkiaSharp" Version="2.88.6" />
     <PackageReference Include="SkiaSharp.Views.Forms" Version="2.88.5" />
     <PackageReference Include="Svg.Skia" Version="1.0.0.2" />
     <PackageReference Include="Topten.RichTextKit" Version="0.4.166" />

source/SkiaSharp.Extended.UI.Forms/SkiaSharp.Extended.UI.Forms.csproj

@@ -17,7 +17,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SkiaSharp" Version="2.88.5" />
+    <PackageReference Include="SkiaSharp" Version="2.88.6" />
     <PackageReference Include="SkiaSharp.Skottie" Version="2.88.5" />
     <PackageReference Include="SkiaSharp.Views.Forms" Version="2.88.5" />
     <PackageReference Include="Xamarin.Forms" Version="5.0.0.2612" />

source/SkiaSharp.Extended/SkiaSharp.Extended.csproj

@@ -13,7 +13,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SkiaSharp" Version="2.88.5" />
+    <PackageReference Include="SkiaSharp" Version="2.88.6" />
   </ItemGroup>
 
 </Project>