package/imx-mkimage: bump to version lf-6.6.23-2.0.0

For change log, see:
https://github.com/nxp-imx/imx-mkimage/compare/lf-6.1.22-2.0.0...lf-6.6.23-2.0.0

Note: the Buildroot package version name before this commit was
"lf-6.6.3_1.0.0" (with an underscore "_"), which was in fact a
branch git reference. See:
https://github.com/nxp-imx/imx-mkimage/tree/lf-6.6.3_1.0.0

It should have been the tag name "lf-6.6.3-1.0.0" (with the dash "-").
See:
https://github.com/nxp-imx/imx-mkimage/releases/tag/lf-6.6.3-1.0.0

This commit fixes this issue by updating to a new git tag reference.

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/imx-mkimage/imx-mkimage.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  48e7bad4a49e693415418859bb0330b63938a77bbb12660bc64761a5daa915c9  imx-mkimage-lf-6.6.3_1.0.0.tar.gz
+sha256  0a5654229c063e4e87b5d69f47a4a913ecee51f8a817ae2346a2a407e765ed3b  imx-mkimage-lf-6.6.23-2.0.0.tar.gz
 sha256  231f7edcc7352d7734a96eef0b8030f77982678c516876fcb81e25b32d68564c  LICENSE

package/imx-mkimage/imx-mkimage.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-IMX_MKIMAGE_VERSION = lf-6.6.3_1.0.0
+IMX_MKIMAGE_VERSION = lf-6.6.23-2.0.0
 IMX_MKIMAGE_SITE = $(call github,nxp-imx,imx-mkimage,$(IMX_MKIMAGE_VERSION))
 IMX_MKIMAGE_LICENSE = GPL-2.0+
 IMX_MKIMAGE_LICENSE_FILES = LICENSE