Update README.md

Author: o2sh

README.md

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   <a href="./LICENSE.md"><img src="https://img.shields.io/badge/license-MIT-blue.svg"></a>
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+  <a href="https://snapcraft.io/onefetch"><img src="https://raw.githubusercontent.com/snapcore/snap-store-badges/master/EN/%5BEN%5D-snap-store-black.png" alt="Get it from the Snap Store"></a>
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 Onefetch is a command line tool that displays information about your Source Code directly on your terminal.Onefetch supports almost 20 different programming languages. If your language of choice isn't supported: Open up an issue and support will be added.
 
 <p align="center">