chore(deps): update tunit to 1.55.2

Author: renovate[bot]

src/Directory.Packages.props

@@ -13,7 +13,7 @@
   <ItemGroup>
     <!-- Testing Framework -->
     <PackageVersion Include="NSubstitute" Version="5.3.0"/>
-    <PackageVersion Include="TUnit" Version="1.49.0"/>
+    <PackageVersion Include="TUnit" Version="1.55.2"/>
     <PackageVersion Include="Verify.TUnit" Version="31.19.0"/>
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0"/>