Update software_setup-Arduino.md

Author: loricrotser

docs/software_setup-Arduino.md

@@ -8,7 +8,7 @@ icon: simple/arduino
 We've written a library to get you started with the SparkFun Optical Tracking Odometry Sensor. You can obtain this library through the Arduino Library Manager by searching for "Odometry" and installing the latest version from SparkFun. If you prefer downloading libraries manually, you can grab them from the GitHub Repository.
 
 <center>
-	[SparkFun Optical Tracking Odometry Sensor Arduino Library GitHub](https://github.com/sparkfun/SparkFun_Qwiic_OTOS_Arduino_Library/archive/refs/heads/main.zip){ .md-button .md-button--primary }
+	[SparkFun Optical Tracking Odometry Sensor Arduino Library GitHub](https://github.com/sparkfun/SparkFun_Qwiic_OTOS_Arduino_Library/archive/refs/heads/main.zip){ .md-button .md-button--primary download }
 </center>