update README

Author: erawn

README.md

@@ -21,11 +21,11 @@ If you have any questions at all, feel free to send me an email at <erawn@berke
 To install the extension, execute:
 
 ```bash
-python -m pip install pagebreaks pagebreaksip
+python -m pip install pagebreaks
 ```
 
 Then, open Jupyter Lab `jupyter lab` and open a Notebook.
-You should see a warning banner telling you to run `%load_ext pagebreaksip`, at which point the warning will disappear, and you'll be good to go.
+You should see a warning banner telling you to run `%load_ext pagebreaksip`, at which point the warning will disappear, and you'll be good to go. (You might have to restart the kernel and reload the webpage, just to be safe)
 
 ## Overview