Update coronavirus definition.

Author: ExpDev07

README.md

@@ -1,6 +1,6 @@
 # coronavirus-tracker (API)
 
-> This is a fast (< 200ms) and basic API for tracking development of the new coronavirus (2019-nCoV). It's written in python using 🍼 Flask.
+> 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.
 
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