emulators/es-de: replace deprecated USES=gettext with gettext-{runtime,tools}

USES=gettext is deprecated according to the Porter's Handbook. Replace
it with gettext-runtime and gettext-tools, both are required.

PORTREVISION isn't bumped because USES=gettext is the same as
USES=gettext-{runtime,tools}.

Ref: https://docs.freebsd.org/en/books/porters-handbook/book/#uses-gettext

PR: 287702
Reported by: Stefan Schlosser <bsdcode@disroot.org> (maintainer)