chore(deps): update dependency nsubstitute to 5.3.0 (#826)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Directory.Packages.props

@@ -21,7 +21,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Logging.Debug" Version="9.0.0" />
     <PackageVersion Include="Nerdbank.GitVersioning" Version="3.7.112" />
-    <PackageVersion Include="NSubstitute" Version="5.1.0" />
+    <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="PublicApiGenerator" Version="11.1.0" />
     <PackageVersion Include="ReactiveUI" Version="$(ReactiveUIVersion)" />
     <PackageVersion Include="ReactiveUI.Maui" Version="$(ReactiveUIVersion)" />