containerd: 1.6.8 -> 1.6.9

https://github.com/containerd/containerd/releases/tag/v1.6.9

pkgs/applications/virtualization/containerd/default.nix

···
 
 buildGoModule rec {
   pname = "containerd";
-  version = "1.6.8";
+  version = "1.6.9";
 
   src = fetchFromGitHub {
     owner = "containerd";
     repo = "containerd";
     rev = "v${version}";
-    sha256 = "sha256-0UiPhkTWV61DnAF5kWd1FctX8i0sXaJ1p/xCMznY/A8=";
+    sha256 = "sha256-KvQdYQLzgt/MKPsA/mO5un6nE3/xcvVYwIveNn/uDnU=";
   };
 
   vendorSha256 = null;