build: bump Microsoft.Maui.Graphics and Microsoft.Maui.Graphics.Skia

Bumps [Microsoft.Maui.Graphics](https://github.com/dotnet/maui) and [Microsoft.Maui.Graphics.Skia](https://github.com/dotnet/maui). These dependencies needed to be updated together.

Updates `Microsoft.Maui.Graphics` from 9.0.40 to 9.0.50
- [Release notes](https://github.com/dotnet/maui/releases)
- [Changelog](https://github.com/dotnet/maui/blob/main/docs/ReleaseSchedule.md)
- [Commits](dotnet/maui@9.0.40...9.0.50)

Updates `Microsoft.Maui.Graphics.Skia` from 9.0.40 to 9.0.50
- [Release notes](https://github.com/dotnet/maui/releases)
- [Changelog](https://github.com/dotnet/maui/blob/main/docs/ReleaseSchedule.md)
- [Commits](dotnet/maui@9.0.40...9.0.50)

---
updated-dependencies:
- dependency-name: Microsoft.Maui.Graphics
  dependency-version: 9.0.50
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.Maui.Graphics.Skia
  dependency-version: 9.0.50
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

App/backend-api/Microsoft.GS.DPS/Microsoft.GS.DPS.csproj

@@ -11,10 +11,10 @@
     <PackageReference Include="Azure.Search.Documents" Version="11.6.0" />
     <PackageReference Include="FluentValidation" Version="11.11.0" />
     <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="11.9.2" />
-    <PackageReference Include="Microsoft.KernelMemory.WebClient" Version="0.98.250324.1" />
-    <PackageReference Include="Microsoft.Maui.Graphics" Version="9.0.40" />
-    <PackageReference Include="Microsoft.Maui.Graphics.Skia" Version="9.0.40" />
-    <PackageReference Include="MongoDB.Driver" Version="3.3.0" />
+    <PackageReference Include="Microsoft.KernelMemory.WebClient" Version="0.79.241014.2" />
+    <PackageReference Include="Microsoft.Maui.Graphics" Version="9.0.50" />
+    <PackageReference Include="Microsoft.Maui.Graphics.Skia" Version="9.0.50" />
+    <PackageReference Include="MongoDB.Driver" Version="2.29.0" />
     <PackageReference Include="MongoDB.Driver.Core" Version="2.29.0" />
     <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="3.116.1" />
   </ItemGroup>