AudioWorkgroup: Update documentation

modules/juce_audio_basics/utilities/juce_AudioWorkgroup.h

@@ -105,21 +105,33 @@ private:
     Here's an example of how you might use this class:
 
     @code
+    Constructor()
+    {
+        startRealtimeThread (RealtimeThreadOptions{}.withApproximateAudioProcessingTime (samplesPerFrame, sampleRate));
+        or
+        startRealtimeThread (RealtimeThreadOptions{}.withProcessingTimeMs (10));
+    }
+
     void Thread::run() override
     {
         WorkgroupToken token;
 
         getWorkgroup().join (token);
 
-        while (! threadShouldExit())
+        while (wait (-1) && ! threadShouldExit())
         {
-            // If the workgroup has changed, rejoin the workgroup with the same token
+            // If the workgroup has changed, rejoin the workgroup with the same token.
             if (workgroupChanged())
                 getWorkgroup().join (token);
 
             // Perform the work here
         }
     }
+
+    void AudioProcessor::processBlock()
+    {
+        workerThread->notify();
+    }
     @endcode
 
     @see Thread, AudioProcessor, WorkgroupToken