Update README.md

Author: rwightman

README.md

@@ -20,6 +20,14 @@ Thanks to the following for hardware support:
 And a big thanks to all GitHub sponsors who helped with some of my costs before I joined Hugging Face.
 
 ## What's New
+### Aug 5, 2022
+* More custom ConvNeXt smaller model defs with weights 
+  * `convnext_femto` - 77.5 @ 224, 78.7 @ 288
+  * `convnext_femto_ols` - 77.9  @ 224, 78.9 @ 288
+  * `convnext_pico` - 79.5 @ 224, 80.4 @ 288
+  * `convnext_pico_ols` - 79.5 @ 224, 80.5 @ 288
+  * `convnext_nano_ols` - 80.9 @ 224, 81.6 @ 288
+* Updated EdgeNeXt to improve ONNX export, add new base variant and weights from original (https://github.com/mmaaz60/EdgeNeXt)
 
 ### July 28, 2022
 * Add freshly minted DeiT-III Medium (width=512, depth=12, num_heads=8) model weights. Thanks [Hugo Touvron](https://github.com/TouvronHugo)!