fix comment

h2/src/main/org/h2/engine/Constants.java

@@ -472,7 +472,7 @@ public class Constants {
     public static final String SUFFIX_TRACE_FILE = ".trace.db";
 
     /**
-     * The delay that is to be used if throttle has been enabled.
+     * How often we check to see if we need to apply a throttling delay if SET THROTTLE has been used.
      */
     public static final int THROTTLE_DELAY = 50;