chore(deps): update tunit to 1.3.15

Author: renovate-bot

Directory.Packages.props

@@ -77,9 +77,9 @@
     <PackageVersion Include="System.Text.Json" Version="9.0.6" />
     <PackageVersion Include="TestableIO.System.IO.Abstractions" Version="22.1.0" />
     <PackageVersion Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="22.1.0" />
-    <PackageVersion Include="TUnit" Version="1.2.11" />
-    <PackageVersion Include="TUnit.Assertions" Version="1.2.11" />
-    <PackageVersion Include="TUnit.Core" Version="1.2.11" />
+    <PackageVersion Include="TUnit" Version="1.3.15" />
+    <PackageVersion Include="TUnit.Assertions" Version="1.3.15" />
+    <PackageVersion Include="TUnit.Core" Version="1.3.15" />
     <PackageVersion Include="vertical-spectreconsolelogger" Version="0.10.1-dev.20241201.35" />
     <PackageVersion Include="YamlDotNet" Version="16.3.0" />
   </ItemGroup>