onnxruntime

d1ac97e4 - Fix #24130 by adding an empty dependency group to the code that generates Microsoft.ML.OnnxRuntime.nuspec (#24131)

Fix #24130 by adding an empty dependency group to the code that generates Microsoft.ML.OnnxRuntime.nuspec (#24131) ### Description As detailed in the issue (#24130), the Microsoft.ML.OnnxRuntime nuspec needs an additional dependency group for the `native` TFM, to allow it to be referenced via `PackageReference` in vcxproj projects. I took a peek at the code after filing the issue, since it seemed like it ought to be a simple fix. It looks like the nuspec file for the `Microsoft.ML.OnnxRuntime` package is generated by the python code in `generate_nuspec_for_native_nuget.py`, so I just added a line of code there. However I'm not sure how the build system invokes this generator so I haven't been able to test it in situ. Let me know if this isn't the right fix! ### Motivation and Context See detailed description in #24130