Fix values.yaml default values for podLabels

There was an error in controller default values for deployment, instead of podLabels - that are referenced in deployment.yaml, there is an example of podLabel (missing "s") that might be misleading

charts/aws-efs-csi-driver/values.yaml

@@ -63,7 +63,7 @@ controller:
   # path on efs when deleteing an access point
   deleteAccessPointRootDir: false
   podAnnotations: {}
-  podLabel: {}
+  podLabels: {}
   hostNetwork: false
   priorityClassName: system-cluster-critical
   dnsPolicy: ClusterFirst