Additional "any type" example

Co-authored-by: Bogdan Pintea <[email protected]>

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/type/DataType.java

@@ -63,7 +63,7 @@
  *     <li>In the new CSV test file, start adding basic functionality tests.
  *     These should include reading and returning values, both from indexed data
  *     and from the ROW command.  It should also include functions that support
- *     "every" type, such as MvFirst.</li>
+ *     "every" type, such as Case or MvFirst.</li>
  *     <li>Add the new type to the CsvTestUtils#Type enum, if it isn't already
  *     there. You may also need to modify CsvAssert to support reading values
  *     of the new type.</li>