Fix subnet flag

Author: shaun-nx

tests/scripts/create-and-setup-gcp-vm.sh

@@ -38,7 +38,7 @@ gcloud compute instances create "${RESOURCE_NAME}" --project="${GKE_PROJECT}" --
     --scopes=https://www.googleapis.com/auth/devstorage.read_only,https://www.googleapis.com/auth/logging.write,https://www.googleapis.com/auth/monitoring.write,https://www.googleapis.com/auth/servicecontrol,https://www.googleapis.com/auth/service.management.readonly,https://www.googleapis.com/auth/trace.append,https://www.googleapis.com/auth/cloud-platform \
     --tags="${NETWORK_TAGS}" --create-disk=auto-delete=yes,boot=yes,device-name="${RESOURCE_NAME}",image-family=projects/"${GKE_PROJECT}"/global/images/ngf-debian,mode=rw,size=20 --no-shielded-secure-boot --shielded-vtpm --shielded-integrity-monitoring --labels=goog-ec-src=vm_add-gcloud --reservation-affinity=any \
     --network=${NETWORK} \
-    --subnetgit co=${NETWORK}
+    --subnet=${NETWORK}
 
 # Add VM IP to GKE master control node access, if required
 if [ "${ADD_VM_IP_AUTH_NETWORKS}" = "true" ]; then