Update readme.md

readme.md

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-# DFlat-pytorch 
+# DFlat
 ## An End-to-End Design Framework for Diffractive Optics and Metasurface-Based Vision Systems
 ![Python](https://img.shields.io/badge/python-3670A0?style=for-the-badge&logo=python&logoColor=ffdd54)
 ![PyTorch](https://img.shields.io/badge/PyTorch-%23EE4C2C.svg?style=for-the-badge&logo=PyTorch&logoColor=white)
@@ -7,8 +7,8 @@
 ![Version](https://img.shields.io/badge/version-2.0.0-blue)
 
 - This repository is the home for the new and maintained version of DFlat. It replaces DFlat-Tensorflow.
-- Note that this package is no longer a direct port of pytorch-tensorflow but is a complete rewrite released in early 2024.
-- The structure of the framework is completely revamped in most places and the algorithms used--in particular for field propagation--is not the same as before. The old pytorch version is now archived as a seperate branch (kept only for historical reasons).
+- Note that this package is no longer a direct port of pytorch-tensorflow but is a complete rewrite (re-)released in February 2024.
+- The structure of the framework is completely revamped in most places and the algorithms used--in particular for field propagation--is not the same as before. The original pytorch version is now archived as a seperate branch (kept only for historical reasons).