Bump Avalonia and Avalonia.Diagnostics

Bumps Avalonia from 11.3.8 to 11.3.9
Bumps Avalonia.Diagnostics from 11.3.8 to 11.3.9

---
updated-dependencies:
- dependency-name: Avalonia
  dependency-version: 11.3.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Avalonia.Diagnostics
  dependency-version: 11.3.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ImageMerge/ImageMerge.csproj

@@ -10,12 +10,12 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Avalonia" Version="11.3.8"/>
+        <PackageReference Include="Avalonia" Version="11.3.9"/>
         <PackageReference Include="Avalonia.Desktop" Version="11.3.8"/>
         <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.8"/>
         <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.8"/>
         <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
-        <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.3.8"/>
+        <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.3.9"/>
         <PackageReference Include="Avalonia.ReactiveUI" Version="11.3.8"/>
         <PackageReference Include="MessageBox.Avalonia" Version="3.3.0"/>
         <PackageReference Include="NetVips" Version="3.1.0"/>