Update README.md

Author: ExpDev07

README.md

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-<center># coronavirus-tracker (API)</center>
+<center>
+  # coronavirus-tracker (API)
+</center>
 
 > This is a fast (< 200ms) and basic API for tracking development of the new coronavirus (COVID-19, SARS-CoV-2). It's written in python using 🍼 Flask. Supports multiple sources!