archivers/deutex: Update to 5.2.3

• Switch to official release tarballs as upstream provides them.

• Change from PORTVERSION to the preferred DISTVERSION to follow the PHB more closely.

• Remove GNU_CONFIGURE_MANPREFIX because it's no longer needed since 9fd7ee1cdf6c.

Changelog:

https://github.com/Doom-Utils/deutex/releases/tag/v5.2.3