Change UART to lines

I'd like to save the USB icon for a USB library. The "stream" lines was
the best I found.

Author: fhunleth

index.html

@@ -46,7 +46,7 @@ <h3><a href="https://github.com/elixir-circuits/circuits_spi">SPI</a></h3>
         </li>
         <li class="library">
           <div class="circle">
-            <a class="text secondary library-name" href="https://github.com/elixir-circuits/circuits_uart"><i class="fab fa-usb"></i></a>
+            <a class="text secondary library-name" href="https://github.com/elixir-circuits/circuits_uart"><i class="fas fa-stream"></i></a>
             <h3><a href="https://github.com/elixir-circuits/circuits_uart">UART</a></h3>
           </div>
         </li>