fix: namspace label key in selectors for netpol

[y-eight]

Currently, the namespace label selector in the NetworkPolicies that will be created by setting the value networkPolicies.enabled to true is not set properly. The key of the namespace selector in the egress and ingress definition is name but should be kubernetes.io/metadata.name.
The kubenetes docs state that the label kubernetes.io/metadata.name is set automatically and the name label is not compulsorily existing.

[mattray]

Needs a minor version bump, I'll do it when I test next