Update dependency TUnit to 1.7.7 (#444)

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

Author: renovate[bot]

Directory.Packages.props

@@ -54,7 +54,7 @@
         <PackageVersion Include="Semi.Avalonia" Version="11.3.7.1"/>
         <PackageVersion Include="Semver" Version="3.0.0"/>
         <PackageVersion Include="System.ServiceModel.Syndication" Version="10.0.1"/>
-        <PackageVersion Include="TUnit" Version="1.7.0"/>
+        <PackageVersion Include="TUnit" Version="1.7.7"/>
         <PackageVersion Include="ValveKeyValue" Version="0.20.0.417"/>
         <PackageVersion Include="Verify.TUnit" Version="31.9.3"/>
         <PackageVersion Include="xunit" Version="2.9.3"/>