Update example docs after switching to clapping event

docs/ml_get_event_certainty.md

@@ -18,7 +18,7 @@ The ML model runs several times a second and calculates a certainty value for ea
 
 ## Example
 
-This example displays the ML model's certainty that the current action is `unknown` every second.
+This example displays the ML model's certainty, in percent, that the current action is `clapping` every second.
 
 ```blocks
 loops.everyInterval(1000, function () {

docs/ml_is_event_detected.md

@@ -20,7 +20,7 @@ Some programs will be easier to write using the “on ML start” and “on ML s
 
 ## Example
 
-This example will show a tick icon on the LED display if the estimated action is `unknown` at the time the conditional statement is checked.
+This example will show a tick icon on the LED display if the estimated action is `clapping` at the time the conditional statement is checked.
 
 ```blocks
 basic.forever(function () {

docs/ml_on_event_start.md

@@ -15,7 +15,7 @@ The ML model updates its estimated action several times a second, but this event
 
 ## Example
 
-This example uses the special `unknown` value and plays a musical melody in the background when no action has a certainty above the recognition point.
+This example plays a musical melody in the background when the action `clapping` has a certainty above the recognition point.
 
 ```blocks
 ml.onStart(ml.event.Clapping, function () {

docs/ml_on_event_stop.md

@@ -17,7 +17,7 @@ For example, if your start event handler for an action starts music playing in t
 
 ## Example
 
-This example uses the special `unknown` option and stops playing a musical melody when the estimated action changes to any other action.
+This example stops playing a musical melody when the estimated action changes from `clapping` to any other action.
 
 ```blocks
 ml.onStop(ml.event.Clapping, function () {

docs/ml_on_event_stop_detailed.md

@@ -19,7 +19,7 @@ The event handler is passed a `duration` parameter. The duration is the [number]
 
 ## Example
 
-This example uses the special `unknown` option and shows the duration that `unknown` was the estimated action for in seconds when the estimated action changes to any other action.
+This example shows on the LED display, in seconds, how long the estimated action was `clapping`, when the estimated action changes from `clapping` to any other action.
 
 ```blocks
 ml.onStopDetailed(ml.event.Clapping, function (duration) {