Update Links

Papers:CoAtNet
It was a link to another page, so I fixed it.

README.md

@@ -32,7 +32,7 @@ All models with the string `tf` are models exactly matching Tensorflow based mod
   - Activations (M): 73.8
   - Image size: 224 x 224
 - **Papers:**
-  - CoAtNet: Marrying Convolution and Attention for All Data Sizes: https://arxiv.org/abs/2201.03545
+  - CoAtNet: Marrying Convolution and Attention for All Data Sizes: https://arxiv.org/abs/2106.04803
 - **Dataset:** ImageNet-12k
 
 ## Model Usage