chore(deps): update tunit to 1.55.2

Author: renovate[bot]

src/Directory.Packages.props

@@ -32,7 +32,7 @@
     <PackageVersion Include="ReactiveUI" Version="23.2.28" />
     <PackageVersion Include="ReactiveUI.Maui" Version="23.2.28" />
     <PackageVersion Include="System.Reactive" Version="6.1.0" />
-    <PackageVersion Include="TUnit" Version="1.53.0" />
+    <PackageVersion Include="TUnit" Version="1.55.2" />
     <PackageVersion Include="Verify.TUnit" Version="31.19.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
   </ItemGroup>