[VNet/TF1] Retirement note updated

Author: nv-kkudrynski

TensorFlow/Segmentation/VNet/README.md

@@ -1,6 +1,6 @@
 # V-Net Medical For Tensorflow
 
-This repository provides a script and recipe to train the V-Net model to achieve state of the art accuracy, and is tested and maintained by NVIDIA. V-Net model for TensorFlow will no longer be available after 04/30/2022, please consider [UNet for 3D image segmentation in TensorFlow](https://github.com/NVIDIA/DeepLearningExamples/tree/master/TensorFlow/Segmentation/UNet_3D_Medical) or [nnU-Net for PyTorch](https://github.com/NVIDIA/DeepLearningExamples/tree/master/PyTorch/Segmentation/nnUNet) as a substitute for your requirements.
+This repository provides a script and recipe to train the V-Net model to achieve state of the art accuracy, and is tested and maintained by NVIDIA. V-Net model for TensorFlow is no longer maintained and will soon become unavailable, please consider [UNet for 3D image segmentation in TensorFlow](https://github.com/NVIDIA/DeepLearningExamples/tree/master/TensorFlow/Segmentation/UNet_3D_Medical) or [nnU-Net for PyTorch](https://github.com/NVIDIA/DeepLearningExamples/tree/master/PyTorch/Segmentation/nnUNet) as a substitute for your requirements.
 
 ## Table of Contents
 
@@ -530,6 +530,10 @@ V-Net model for TensorFlow will no longer be available after 04/30/2022, please
 
 ### Changelog
 
+April 2021
+
+* Ceased maintenance of the model
+
 June 2020
 
 * Updated training and inference accuracy