added comment'

nrf52/index.html

@@ -50,7 +50,7 @@ void loop() {}
 <figcaption>Ring oscillator with nrf52 using Arduino library calls.</figcaption>
 </figure>
 
-<p>The code for this is below:</p>
+<p>The code for this is below.  Most of the overhead is in the use of the "loop" function.</p>
 
 <pre>
 <code>