Bump NSubstitute from 5.0.0 to 5.1.0 (#384)

Bumps NSubstitute from 5.0.0 to 5.1.0.

---
updated-dependencies:
- dependency-name: NSubstitute
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Directory.Packages.props

@@ -21,7 +21,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="1.1.1" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageVersion Include="NSubstitute" Version="5.0.0" />
+    <PackageVersion Include="NSubstitute" Version="5.1.0" />
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.16" />
     <PackageVersion Include="NUnit" Version="3.13.3" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />