fix: Marechai/Marechai.csproj to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DOTNET-SKIASHARP-5922114

Marechai/Marechai.csproj

@@ -29,7 +29,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="5.0.1" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="5.0.1" />
     <PackageReference Include="MySql.Data" Version="8.0.22" />
-    <PackageReference Include="SkiaSharp" Version="2.80.2" />
+    <PackageReference Include="SkiaSharp" Version="2.88.6" />
     <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.2" />
     <PackageReference Include="Svg.Skia" Version="0.4.1" />
     <PackageReference Include="Tewr.Blazor.FileReader" Version="3.0.0.20340" />