Bump Avalonia.Diagnostics from 11.0.0-preview5 to 11.0.3

Bumps [Avalonia.Diagnostics](https://github.com/AvaloniaUI/Avalonia) from 11.0.0-preview5 to 11.0.3.
- [Release notes](https://github.com/AvaloniaUI/Avalonia/releases)
- [Commits](https://github.com/AvaloniaUI/Avalonia/commits)

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

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

Cpp2IL.Gui/Cpp2IL.Gui.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <BuiltInComInteropSupport>true</BuiltInComInteropSupport> <!--Needed for avalonia-->
         <Configurations>Debug;Release</Configurations>
@@ -22,7 +22,7 @@
         <PackageReference Include="Avalonia" Version="11.0.0-preview5" />
         <PackageReference Include="Avalonia.AvaloniaEdit" Version="11.0.0-preview2" />
         <PackageReference Include="Avalonia.Desktop" Version="11.0.0-preview5" />
-        <PackageReference Include="Avalonia.Diagnostics" Version="11.0.0-preview5" />
+        <PackageReference Include="Avalonia.Diagnostics" Version="11.0.3" />
         <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.0-preview5" />
         <PackageReference Include="Avalonia.Themes.Simple" Version="11.0.0-preview5" />
         <PackageReference Include="AvaloniaEdit.TextMate" Version="11.0.0-preview2" />