Merge pull request #3 from SyncfusionExamples/ArulrajAboo-patch-3

Update README.md

Author: ArulrajAboo

README.md

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 # How to Create Flutter Charts from JSON Data
 A quick-start example to help you create a chart from JSON data using the Syncfusion Flutter Chart. You will learn how to load the JSON data and map it to the chart series.
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 Watch the video: Coming soon...
 
 Documentation: https://help.syncfusion.com/flutter/cartesian-charts/getting-started