Incorrect kubernetes annotations

[mmuffins]

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

I believe the service account labels/annotations may be outdated or incorrect. azure.workload.identity/use is a pod label, not a service account one. In additon, pods also need a serviceaccount property in their spec section, otherwise they will not correctly reference the service account and fail.

The labels and annotations are also documented at azure.workload.identity/use, and a working example is found at https://learn.microsoft.com/en-us/azure/aks/workload-identity-deploy-cluster