update logo

Author: NullPointerException

README.md

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-<p align="center"><img src="https://i.imgur.com/Q7R0xTU.png" width="150"></p> 
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 <h2 align="center"><b>PipePipe</b></h2>
 <h4 align="center">
 NewPipe, reimagined: faster, more stable, and packed with more features.</h4>