Bump the dotnet group in /docs/csharp/roslyn-sdk/tutorials/snippets/how-to-write-csharp-analyzer-code-fix/MakeConst/MakeConst.Test with 2 updates

Bump the dotnet group in /docs/csharp/roslyn-sdk/tutorials/snippets/how-to-write-csharp-analyzer-code-fix/MakeConst/MakeConst.Test with 2 updates #3242