update comments

Signed-off-by: Itay Dafna <[email protected]>

Author: ibdafna

README.md

@@ -19,6 +19,8 @@ Fast Datagrid widget for the Jupyter Notebook and JupyterLab
 
 ## Installation
 
+If using JupyterLab, `ipydatagrid` requires version 3 or higher.
+
 You can install `ipydatagrid` using `pip` or `conda`:
 
 Using `pip`:
@@ -33,12 +35,6 @@ Using `conda`:
 conda install -c conda-forge ipydatagrid
 ```
 
-To enable `ipydatagrid` with JupyterLab:
-
-```bash
-jupyter labextension install @jupyter-widgets/jupyterlab-manager ipydatagrid
-```
-
 If you are using Jupyter Notebook 5.2 or earlier, you may also need to enable
 the nbextension: