Fix controller.podLabels typo in values.yaml

[pvickery-ParamountCommerce]

Is this a bug fix or adding new feature?
This fixes a typo in values.yaml which can cause confusion.
controller.podLabel -> controller.podLabels

What is this PR about? / Why do we need it?

What testing is done?
Searching for the use of .Values.controller.podLabel
https://github.com/search?q=repo%3Akubernetes-sigs%2Faws-efs-csi-driver%20controller.podLabels&type=code

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