Update Skia version to remove vulnerability

[JoonghyunCho]

This PR updates following Skia version to remove security vulnerability.

  <ItemGroup>
    <PackageReference Include="Microsoft.Maui.Graphics" Version="$(MicrosoftMauiGraphicsVersion)" />
    <PackageReference Include="Microsoft.Maui.Graphics.Skia" Version="$(MicrosoftMauiGraphicsVersion)" />
  </ItemGroup>

Background

(dotnet/maui#17558)
About 3 weeks ago, security vulnerability is detected for SkiaSharp.Views and any project referencing this package is warned for the security vulnerability.
The vulnerability is patched in SkiaSharp v2.88.6 and Microsoft.Maui.Graphics is now released with it on v8.0.0-rc.2.9373.

What to do next?

• Release Tizen.UIExtensions (eg. v0.9.1)
• Update Tizen.UIExtensions on MAUI.
• Remove SkiaSharp.Views direct reference from CommunityToolkit.Maui which was the workaround for Tizen.

[rookiejava]

Thanks. Could you also look into failed reated to build action?

[JoonghyunCho]

@rookiejava Absolutely! Issue is fixed on #25.
I will rebase the PR when it is merged.

[rookiejava]

@rookiejava Absolutely! Issue is fixed on #25. I will rebase the PR when it is merged.

#25 has been merged.

[JoonghyunCho]

SkiaSharp.Views direct reference is added because net6.0 Microsoft.Maui.Graphics is not released anymore.