Fix Avalonia.Desktop.slnf compiling (#20461)

Avalonia.Desktop.slnf

@@ -22,7 +22,6 @@
       "src\\Avalonia.Controls\\Avalonia.Controls.csproj",
       "src\\Avalonia.DesignerSupport\\Avalonia.DesignerSupport.csproj",
       "src\\Avalonia.Desktop\\Avalonia.Desktop.csproj",
-      "src\\Avalonia.Diagnostics\\Avalonia.Diagnostics.csproj",
       "src\\Avalonia.Dialogs\\Avalonia.Dialogs.csproj",
       "src\\Avalonia.Fonts.Inter\\Avalonia.Fonts.Inter.csproj",
       "src\\Avalonia.FreeDesktop\\Avalonia.FreeDesktop.csproj",
@@ -35,6 +34,7 @@
       "src\\Avalonia.Themes.Fluent\\Avalonia.Themes.Fluent.csproj",
       "src\\Avalonia.Themes.Simple\\Avalonia.Themes.Simple.csproj",
       "src\\Avalonia.X11\\Avalonia.X11.csproj",
+      "src\\HarfBuzz\\Avalonia.HarfBuzz\\Avalonia.HarfBuzz.csproj",
       "src\\Headless\\Avalonia.Headless.Vnc\\Avalonia.Headless.Vnc.csproj",
       "src\\Headless\\Avalonia.Headless\\Avalonia.Headless.csproj",
       "src\\Linux\\Avalonia.LinuxFramebuffer\\Avalonia.LinuxFramebuffer.csproj",