Add note about OFFSET / FETCH with FOR UPDATE

h2/src/docsrc/help/help.csv

@@ -41,7 +41,8 @@ of H2 please use parentheses.
 
 If FOR UPDATE is specified, the tables or rows are locked for writing.
 This clause is not allowed in DISTINCT queries and in queries with non-window aggregates, GROUP BY, or HAVING clauses.
-When using default MVStore engine only the selected rows are locked as in an UPDATE statement.
+When using default MVStore engine only the selected rows are locked as in an UPDATE statement;
+locking behavior for rows that were excluded from result using OFFSET / FETCH is undefined.
 With PageStore engine the whole tables are locked.
 ","
 SELECT * FROM TEST;