chore(deps): update dependency tunit to 1.5.6 (#69)

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

Author: renovate[bot]

Directory.Packages.props

@@ -17,7 +17,7 @@
     <PackageVersion Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.1.0" />
     <PackageVersion Include="NetEvolve.Extensions.TUnit" Version="3.2.3" />
     <PackageVersion Include="System.Memory" Version="4.6.3" />
-    <PackageVersion Include="TUnit" Version="1.5.1" />
+    <PackageVersion Include="TUnit" Version="1.5.6" />
     <PackageVersion Include="Verify.ParametersHashing" Version="1.0.0" />
     <PackageVersion Include="Verify.TUnit" Version="31.8.0" />
   </ItemGroup>