x11/alacritty: pet portlint after r481921

$ portlint -C
FATAL: Makefile: DISTVERSIONPREFIX appears out-of-order.
FATAL: Makefile: order must be PORTNAME/PORTVERSION/DISTVERSIONPREFIX/DISTVERSION/DISTVERSIONSUFFIX/PORTREVISION/PORTEPOCH/CATEGORIES/MASTER_SITES/MASTER_SITE_SUBDIR/PROJECTHOST/PKGNAMEPREFIX/PKGNAMESUFFIX/DISTNAME/EXTRACT_SUFX/DISTFILES/DIST_SUBDIR/EXTRACT_ONLY.
2 fatal errors and 0 warnings found.