Docs: Fix "the the."

Change-Id: I5224ef0d40969cc79b61f65871ff24e72c10235e
diff --git a/src/devices/audio/testing_circuit.jd b/src/devices/audio/testing_circuit.jd
index 12a5bcb..1881e0c 100644
--- a/src/devices/audio/testing_circuit.jd
+++ b/src/devices/audio/testing_circuit.jd
@@ -89,6 +89,6 @@
 
 <p>
 This <a href="http://www.youtube.com/watch?v=f95S2IILBJY">Youtube video</a>
-shows the the breadboard version testing circuit in operation.
+shows the breadboard version testing circuit in operation.
 Skip ahead to 1:00 to see the circuit.
 </p>