Bump Dock.Avalonia from 12.1.0.2 to 12.1.0.4

---
updated-dependencies:
- dependency-name: Dock.Avalonia
  dependency-version: 12.1.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="Avalonia.Themes.Fluent" Version="12.1.1" />
     <PackageVersion Include="AvaloniaUI.DiagnosticsSupport" Version="2.2.3" />
     <PackageVersion Include="coverlet.collector" Version="10.0.1" />
-    <PackageVersion Include="Dock.Avalonia" Version="12.1.0.2" />
+    <PackageVersion Include="Dock.Avalonia" Version="12.1.0.4" />
     <PackageVersion Include="Dock.Avalonia.Themes.Fluent" Version="12.1.0.2" />
     <PackageVersion Include="Dock.Model.Avalonia" Version="12.1.0.2" />
     <PackageVersion Include="Dock.Model.Mvvm" Version="12.1.0.2" />