Fix doc.

docs/index.html

@@ -51,7 +51,7 @@ users can use the SMXConfig application to manage their platform.
     a smaller number of panels installed.  If an application wants to adapt its UI to the
     user's panel configuration, see enabledSensors to detect which sensors are enabled.
     <p>
-    Each panel has four sensors, and if a panel is disabled, all four of its panels will be
+    Each panel has four sensors, and if a panel is disabled, all four of its sensors will be
     disabled.  Disabling individual sensors is possible, but removing individual sensors
     reduces the performance of the pad and isn't recommended.
     <p>