Update introduction.md

Author: bboyho

docs/introduction.md

@@ -39,7 +39,9 @@ The [SparkFun BlueSMiRF v2](https://www.sparkfun.com/products/24113) is a wirele
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 In this tutorial, we'll go over the hardware and how to hookup the breakout board. We will also go over how to connect to a smartphone and a basic Arduino example to get started!