mail/dovecot-fts-xapian: Update to 1.5.1

mail/dovecot-fts-xapian/Makefile

 PORTNAME=	fts-xapian
-DISTVERSION=	1.5.0
+DISTVERSION=	1.5.1
 CATEGORIES=	mail
 MASTER_SITES=	https://github.com/grosjo/fts-xapian/releases/download/${DISTVERSION}/
 PKGNAMEPREFIX=	dovecot-

mail/dovecot-fts-xapian/distinfo

-TIMESTAMP = 1636622688
-SHA256 (dovecot-fts-xapian-1.5.0.tar.gz) = 75190c23af045bdc5afc5854e851b445e8581c36101affe422da22827dcaf78b
-SIZE (dovecot-fts-xapian-1.5.0.tar.gz) = 2809933
+TIMESTAMP = 1636662908
+SHA256 (dovecot-fts-xapian-1.5.1.tar.gz) = 12b610492849440b96fc8527a98cd537fe14465c4e618eacfd9651101e343f2e
+SIZE (dovecot-fts-xapian-1.5.1.tar.gz) = 2896670