graphics/gdal: switch to Qhull8

Note: PR 261279 had been approved previously, and the port has been
upgraded to 3.4.1; only the swith to Qhull8 was missing.

PR:		261279

graphics/gdal/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	gdal
 PORTVERSION=	3.4.1
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	graphics geography
 MASTER_SITES=	https://download.osgeo.org/gdal/${PORTVERSION}/ \
 		LOCAL/sunpoet
@@ -20,7 +20,7 @@ LIB_DEPENDS=	libgeotiff.so:graphics/libgeotiff \
 		libjson-c.so:devel/json-c \
 		libpng.so:graphics/png \
 		libproj.so:graphics/proj \
-		libqhull_r.so:math/qhull \
+		libqhull_r.so:math/qhull8 \
 		libtiff.so:graphics/tiff
 
 OPTIONS_DEFINE=	ARMADILLO CFITSIO CHARLS CRYPTOPP CURL DEFLATE DODS ECW EXPAT EXR FREEXL GEOS GTA HDF5 HEIF JASPER KML LERC LIBXML2 LZ4 MYSQL NETCDF ODBC OPENJPEG PCRE PCRE2 PGSQL RASTERLITE2 SFCGAL SPATIALITE SQLITE TILEDB WEBP XERCES ZSTD