grep: bump to version 2.23

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/grep/grep.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking signature
-sha256	ca91d22f017bfcb503d4bc3b44295491c89a33a3df0c3d8b8614f2d3831836eb	grep-2.22.tar.xz
+sha256	54fc478ee1ce17780109820ef30730c9e18715a949f7d5c6afc673adb2a56ecf	grep-2.23.tar.xz

package/grep/grep.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GREP_VERSION = 2.22
+GREP_VERSION = 2.23
 GREP_SITE = $(BR2_GNU_MIRROR)/grep
 GREP_SOURCE = grep-$(GREP_VERSION).tar.xz
 GREP_LICENSE = GPLv3+