Update README.md with new model card content

README.md

@@ -20,7 +20,7 @@ Keras and KerasHub can be installed with:
 
 ```
 pip install -U -q keras-hub
-pip install -U -q keras>=3
+pip install -U -q keras>3
 ```
 
 Jax, TensorFlow, and Torch come preinstalled in Kaggle Notebooks. For instructions on installing them in another environment see the [Keras Getting Started](https://keras.io/getting_started/) page.