Describe the bug

When initialising C# project it creates a project with target version of net6. This version is now out of support (See https://dotnet.microsoft.com/en-us/download/dotnet).

By default, this should create a project with the target version of net8 (LTS).

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

Initialise project with .NET 8 as the default

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    ...
  </PropertyGroup>

Current Behavior

Project is Initialised with .NET 6 target framework

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    ....
  </PropertyGroup>

Reproduction Steps

cdk init app --language csharp

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.174.0 (build 9604329)

Framework Version

No response

Node.js Version

20.18.1

OS

Darwin arm64 24.2.0

Language

.NET

Language Version

.NET 8.0.404

Other information

No response