containerd: Update to v1.6.8 for Docker v20.10.18

Signed-off-by: Gerard Ryan <G.M0N3Y.2503@gmail.com>

utils/containerd/Makefile

@@ -1,14 +1,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=containerd
-PKG_VERSION:=1.6.6
-PKG_RELEASE:=1
+PKG_VERSION:=1.6.8
+PKG_RELEASE:=$(AUTORELEASE)
 PKG_LICENSE:=Apache-2.0
 PKG_LICENSE_FILES:=LICENSE
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/containerd/containerd/tar.gz/v${PKG_VERSION}?
-PKG_HASH:=27afb673c20d53aa5c31aec07b38eb7e4dc911e7e1f0c76fac9513bbf070bd24
+PKG_HASH:=f5f938513c28377f64f85e84f2750d39f26b01262f3a062b7e8ce35b560ca407
 
 PKG_MAINTAINER:=Gerard Ryan <G.M0N3Y.2503@gmail.com>