Fix failing Spec tests (#142)

* Initial plan

* Fix Spec tests failing due to NUnit3TestAdapter 6.0.0 transitive dependencies

Updated DeveroomSample.csproj.txt template to use compatible package versions:
- System.Threading.Tasks.Extensions 4.5.4 -> 4.6.3
- System.ValueTuple 4.5.0 -> 4.6.1

This fixes NU1605 errors during dotnet restore of generated sample projects
caused by package downgrade conflicts with NUnit3TestAdapter 6.0.0's
transitive dependencies.

Fixes #141

Co-authored-by: 304NotModified <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: 304NotModified <[email protected]>

Author: Copilot

Tests/Reqnroll.SampleProjectGenerator.Core/Templates/CS-NEW/DeveroomSample.csproj.txt

@@ -6,9 +6,9 @@
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
   </PropertyGroup>
   <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' ">
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
+    <PackageReference Include="System.ValueTuple" Version="4.6.1" />
     <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.6.3" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />