Fix bug in validator/metrics.go for driver validation #114

Job	Run time
validate-helm-values	1m 3s
helm-lint	7s
validate-csv	33s
go-build	1m 23s
go-check	1m 44s
unit tests	49s
build-gpu-operator-validator (ubi8)	9m 53s
build-gpu-operator (ubi8)	12m 44s
e2e-tests-containerd	45m 33s
e2e-tests-nvidiadriver	30m 25s
	1h 44m 14s

Provide feedback