Update README.md (#216)

Author: Mithil467

README.md

@@ -4,7 +4,7 @@
 [![Build Status](https://github.com/jupyterlab/jupyterlab_server/workflows/Tests/badge.svg?branch=master)](https://github.com/jupyterlab/jupyterlab_server/actions?query=branch%3Amaster+workflow%3A%22Tests%22)
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-## Movivation
+## Motivation
 
 JupyterLab Server sits between JupyterLab and Jupyter Server, and provides a
 set of REST API handlers and utilities that are used by JupyterLab.  It is a separate project in order to