Update SkiaSharp to 2.88.6 to fix a critical security vulnerability (#13109)

* Update SkiaSharp to 2.88.6 to fix a critical security vulnerability

* Looks like Tizen needs to be updated separately

build/SkiaSharp.props

@@ -1,7 +1,7 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <PackageReference Include="SkiaSharp" Version="2.88.3" />
-    <PackageReference Condition="'$(IncludeLinuxSkia)' == 'true'" Include="SkiaSharp.NativeAssets.Linux" Version="2.88.3" />
-    <PackageReference Condition="'$(IncludeWasmSkia)' == 'true'" Include="SkiaSharp.NativeAssets.WebAssembly" Version="2.88.3" />
+    <PackageReference Include="SkiaSharp" Version="2.88.6" />
+    <PackageReference Condition="'$(IncludeLinuxSkia)' == 'true'" Include="SkiaSharp.NativeAssets.Linux" Version="2.88.6" />
+    <PackageReference Condition="'$(IncludeWasmSkia)' == 'true'" Include="SkiaSharp.NativeAssets.WebAssembly" Version="2.88.6" />
   </ItemGroup>
 </Project>

src/Tizen/Avalonia.Tizen/Avalonia.Tizen.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SkiaSharp.HarfBuzz" Version="2.88.3" />
+    <PackageReference Include="SkiaSharp.HarfBuzz" Version="2.88.6" />
     <PackageReference Include="HarfBuzzSharp.NativeAssets.Tizen" Version="2.8.2.3" />
     
     <ProjectReference Include="..\..\..\packages\Avalonia\Avalonia.csproj" />