Update phpunit_bridge.rst

$stopwatch->stop('event_name')->getDuration() returns time in milliseconds, so original test will fail in any way.. but not only because of "However, depending on the load of the server or the processes running on your local machine, the $duration could for example be 10.000023s instead of 10s."

Author: temenb

components/phpunit_bridge.rst

@@ -167,7 +167,7 @@ If you have this kind of time-related tests::
             sleep(10);
             $duration = $stopwatch->stop('event_name')->getDuration();
 
-            $this->assertEquals(10, $duration);
+            $this->assertEquals(10000, $duration);
         }
     }