Correction: uncompressed is the default value

CLA: trivial

The description was incorrect. The uncompressed is the default value.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18889)

(cherry picked from commit df274c33)