build(deps): Bump NSubstitute from 5.0.0 to 5.1.0

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
...

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

Author: dependabot[bot]

tests/Directory.Build.props

@@ -18,7 +18,7 @@
 		<PackageReference Include="AutoFixture" Version="4.18.0" />
 		<PackageReference Include="AutoFixture.Xunit2" Version="4.18.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-		<PackageReference Include="NSubstitute" Version="5.0.0" />
+		<PackageReference Include="NSubstitute" Version="5.1.0" />
 		<PackageReference Include="Shouldly" Version="4.2.1" />
 		<PackageReference Include="coverlet.msbuild" Version="6.0.0" PrivateAssets="All" />
 		<PackageReference Include="Xunit.Combinatorial" Version="1.6.24" />