vmtests: bump base image used to root-images:20240717.161638

[ upstream commit 9e8f005 ]

For the base image to have nc.openbsd, see
cilium/little-vm-helper-images@2af406c.

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>

tests/vmtests/fetch-data.sh

@@ -4,7 +4,7 @@ set -eu -o pipefail
 
 
 OCIORG=quay.io/lvh-images
-ROOTIMG=$OCIORG/root-images
+ROOTIMG=$OCIORG/root-images:20240717.161638@sha256:62a9890111ab39749792fda4f59c8f736fa350ecaedb0667e3eecbbe790d82ed
 KERNIMG=$OCIORG/kernel-images
 CONTAINER_ENGINE=${CONTAINER_ENGINE:-docker}
 KERNEL_VERS="$@"