Fix typo in RestServerSpec

[Kidswiss]

Description

type RestServerSpec struct {
URL string json:"url,omitempty"
UserSecretRef *corev1.SecretKeySelector json:"userSecretRef,omitempty"
PasswordSecretReg *corev1.SecretKeySelector json:"passwordSecretReg,omitempty"
}

PasswordSecretReg -> PasswordSecretRef

However, as this changes a CRD field, we'd probably want to implement some mutation webhook to automatically re-write the wrong field.

Additional Context

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Logs

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Expected Behavior

PasswordSecretRef

Steps To Reproduce

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Version of K8up

Current master (a76028a)

Version of Kubernetes

N/A

Distribution of Kubernetes

N/A