Update README.md

Author: UmaMaheswariChandrabose

README.md

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-# React Scheduler - How to load appointments from a JSON file?
-A quick start React project that helps you to create a React Scheduler that loads its appointment data from an external JSON file.
+# React Scheduler - How to load appointments from a local JSON file?
+A quick start React project that helps you to create a React Scheduler that loads its appointment data from a local JSON file.
 
 ## Project pre-requisites
 Make sure that you have the compatible versions of React and NPM in your machine before starting to work on this project.