package/ethtool: bump version to 6.15

Changelog:
https://git.kernel.org/pub/scm/network/ethtool/ethtool.git/tree/NEWS?h=v6.15

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[Julien: update change log url to use tag]
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/ethtool/ethtool.hash

@@ -1,5 +1,5 @@
 # From https://www.kernel.org/pub/software/network/ethtool/sha256sums.asc
-sha256  9338bb00e492878d3bbe3cd2894e60db35813634c208db0b20f5c7ee84da69b1  ethtool-6.14.tar.xz
+sha256  9477c365114d910120aaec5336a1d16196c833d8486f7c6da67bedef57880ade  ethtool-6.15.tar.xz
 
 # Locally calculated
 sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/ethtool/ethtool.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ETHTOOL_VERSION = 6.14
+ETHTOOL_VERSION = 6.15
 ETHTOOL_SOURCE = ethtool-$(ETHTOOL_VERSION).tar.xz
 ETHTOOL_SITE = $(BR2_KERNEL_MIRROR)/software/network/ethtool
 ETHTOOL_LICENSE = GPL-2.0