Update help.csv

h2/src/docsrc/help/help.csv

@@ -1839,7 +1839,7 @@ but only for at most the time defined by the database setting ""h2.maxCompactTim
 
 SHUTDOWN IMMEDIATELY closes the database files without any cleanup and without compacting.
 
-SHUTDOWN DEFRAG re-orders the pages when closing the database so that table scans are faster.
+SHUTDOWN DEFRAG re-orders the pages when closing the database so that table scans are faster. In case of MVStore it is currently equvalent to COMPACT.
 
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