Bump nvidia/cuda from 12.5.1-base-ubi8 to 12.6.0-base-ubi8 in /validator #362

Job	Run time
validate-helm-values	24s
validate-csv	26s
helm-lint	8s
go-check	1m 46s
go-build	1m 34s
unit tests	43s
build-gpu-operator-validator (ubi8)	1m 25s
build-gpu-operator (ubi8)	1m 39s
e2e-tests-nvidiadriver	1m 24s
e2e-tests-containerd	1m 21s
	10m 50s

Provide feedback