Update dependency TUnit to 1.61.15

Author: renovate-bot

Directory.Packages.props

@@ -41,7 +41,7 @@
         <PackageVersion Include="ILRepack" Version="2.0.45"/>
 
         <!-- Testing -->
-        <PackageVersion Include="TUnit" Version="1.45.0"/>
+        <PackageVersion Include="TUnit" Version="1.61.15"/>
         <PackageVersion Include="Shouldly" Version="4.3.0"/>
 
         <!-- Development Tools -->