message: Update regex_extract test
diff: @@ -75,7 +75,7 @@ SELECT regexp_extract(s, '(b..)(b..)', i) FROM test
  query T
  SELECT regexp_extract('foobarbaz', NULL, 0)
  ----
  -(empty)
  +NULL
  query T
  SELECT regexp_extract('foobarbaz', 'b..', NULL)
  