MINOR: Fix Union stream kinds in spec

[Jefffrey]

Minor typo fix

[deshanxiao]

Thank you @Jefffrey Good catch!

Here is the code:

orc/java/core/src/java/org/apache/orc/impl/writer/UnionTreeWriter.java

Line 50 in 513922a

new StreamName(id, OrcProto.Stream.Kind.DATA, encryption)));

[deshanxiao]

@Jefffrey Could you please check ORCv0 and ORCv2 and update them? Thank you.

cc @dongjoon-hyun

[Jefffrey]

Sure thing, done 👍

[deshanxiao]

Merged to main. Thanks @Jefffrey @wgtmac !