chore(deps): update dependency tunit to 1.3.15

Author: renovate[bot]

Directory.Packages.props

@@ -23,7 +23,7 @@
     <PackageVersion Include="NUnit3TestAdapter" Version="5.2.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.11.2" />
     <PackageVersion Include="PublicApiGenerator" Version="11.5.3" />
-    <PackageVersion Include="TUnit" Version="1.3.0" />
+    <PackageVersion Include="TUnit" Version="1.3.15" />
     <PackageVersion Include="TUnit.Core" Version="1.3.9" />
     <PackageVersion Include="Verify.MSTest" Version="31.7.3" />
     <PackageVersion Include="Verify.NUnit" Version="31.7.3" />