Merge pull request #1518 from marquiz/devel/docs-fix

docs: second fix to the prometheus kustomize overlay name

Author: k8s-ci-robot

docs/deployment/metrics.md

@@ -35,7 +35,7 @@ The exposed metrics are
 ## Kustomize
 
 To deploy NFD with metrics enabled using kustomize, you can use the
-[Metrics Overlay](kustomize.md#metrics).
+[prometheus overlay](kustomize.md#metrics).
 
 ## Helm