Apply suggestions from code review

Co-authored-by: Michał Krassowski <[email protected]>

README.md

@@ -3,7 +3,6 @@
 [![Github Actions Status](https://github.com/datalayer/jupyter-server-nbmodel/workflows/Build/badge.svg)](https://github.com/datalayer/jupyter-server-nbmodel/actions/workflows/build.yml)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/datalayer/jupyter-server-nbmodel/main?urlpath=lab)
 
-
 A Jupyter Server extension to execute code cell from the server.
 
 This extension is composed of a Python package named `jupyter_server_nbmodel`
@@ -14,7 +13,7 @@ for the frontend extension.
 
 - Jupyter Server
 - \[recommended\] Real-time collaboration for JupyterLab/Notebook:
-    This will push the kernels results in the notebook from the server.
+   This will push the kernels results in the notebook from the server.
 
 ## Install