Bump Avalonia.Desktop from 11.0.7 to 11.0.9

Bumps [Avalonia.Desktop](https://github.com/AvaloniaUI/Avalonia) from 11.0.7 to 11.0.9.
- [Release notes](https://github.com/AvaloniaUI/Avalonia/releases)
- [Commits](AvaloniaUI/Avalonia@11.0.7...11.0.9)

---
updated-dependencies:
- dependency-name: Avalonia.Desktop
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

GTiff2Tiles.Avalonia/GTiff2Tiles.Avalonia.csproj

@@ -8,7 +8,7 @@
     <ItemGroup>
         <!-- External dependencies -->
         <PackageReference Include="Avalonia" Version="11.0.9" />
-        <PackageReference Include="Avalonia.Desktop" Version="11.0.7" />
+        <PackageReference Include="Avalonia.Desktop" Version="11.0.9" />
         <PackageReference Include="Avalonia.Diagnostics" Version="11.0.7" />
         <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.7" />
         <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.7" />