update mermaid

src/test/TestAlgoDiffusionAtom.java

@@ -58,7 +58,7 @@ public class TestAlgoDiffusionAtom {
             c.attach(canal);
         }
          
-        ScheduledExecutorService clock =  scheduler.getScheculer();
+        ScheduledExecutorService clock =  scheduler.getScheduler();
         ScheduledFuture<?> future = clock.scheduleAtFixedRate(() -> c.tick(), 0, 500, TimeUnit.MILLISECONDS);
 
         for(int i = TEST_TIME/6; i>0; i--){ //attend que le capteur génère des valeurs