[easy] Rename fb::jpeg_decode_to_NCHW to fb::image_decode_to_NCHW (#55857)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55857
Since OpenCV supports more than just the JPEG file format.
ghstack-source-id: 126528422
Test Plan: Build
Reviewed By: JacobSzwejbka
Differential Revision: D27722865
fbshipit-source-id: 6cf83bf187bb1fb3a28e3aa2a011959ef8925449
