Update dependency AutoFixture.AutoNSubstitute to v4.18.1

Author: renovate[bot]

tests/Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <ItemGroup>
-        <PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.17.0" />
+        <PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.18.1" />
         <PackageReference Include="AutoFixture.NUnit3" Version="4.17.0" />
         <PackageReference Include="FluentAssertions" Version="5.10.3" />
         <PackageReference Include="NSubstitute" Version="4.2.2" />