chore(deps): update dependency mocks.maui to 1.2.3

Author: renovate[bot]

src/Directory.Packages.props

@@ -20,7 +20,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.1742" />
     <PackageVersion Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.135" />
-    <PackageVersion Include="Mocks.Maui" Version="1.1.8" />
+    <PackageVersion Include="Mocks.Maui" Version="1.2.3" />
     <PackageVersion Include="Nerdbank.GitVersioning" Version="3.7.115" />
     <PackageVersion Include="PublicApiGenerator" Version="11.4.5" />
     <PackageVersion Include="Reactive.Wasm" Version="2.1.2" />