package/libheif: bump version to 1.18.2

Release notes:
https://github.com/strukturag/libheif/releases/tag/v1.18.2

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libheif/libheif.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256  8702564b0f288707ea72b260b3bf4ba9bf7abfa7dac01353def3a86acd6bbb76  libheif-1.18.1.tar.gz
+sha256  c4002a622bec9f519f29d84bfdc6024e33fd67953a5fb4dc2c2f11f67d5e45bf  libheif-1.18.2.tar.gz
 sha256  b2eb4f6588b005bebac44cfb2dfd23f6a16c5ca9b8a619a315158b0215a917a3  COPYING

package/libheif/libheif.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBHEIF_VERSION = 1.18.1
+LIBHEIF_VERSION = 1.18.2
 LIBHEIF_SITE = https://github.com/strukturag/libheif/releases/download/v$(LIBHEIF_VERSION)
 LIBHEIF_LICENSE = LGPL-3.0+
 LIBHEIF_LICENSE_FILES = COPYING