This is a minor patch release on 1.5.1 with the following changes:
- Remove dependency on cudnn64_7.dll for GPU C# nuget: #5386
- Add config keys header file in the packages for Linux and Mac: #5388
- Add flatbuffers verifier for ORT format buffer: #5378
- Use official flatbuffers v1.12: #5392
- Mitigate pybind11 build break using Xcode 12 on macOS: #5381
- Support trilinear sampling in the Resize operator: #5300
- Update TensorRT parser to fix accuracy issue in some opset11 models: #5442