Feature(EJ2-65076):Readme updated.

README.md

@@ -1,7 +1,7 @@
 # ej2-angular-bpmn-editor
 The BPMN shapes help us to represent internal business processes in a graphical notation. They enable you to communicate procedures in a standard manner. These shapes are popular and intuitive graphics that can be easily understood by all business stakeholders, including business users, business analysts, software developers, and data architects. 
 
-## Pre-Requests
+## Prerequisite 
 
 Install Node version - 14.17.3 from https://nodejs.org/en/download/