feat(secret): add support for DeletedAt in SecretVersion (#2404)

Co-authored-by: Rémy Léone <[email protected]>

Author: scaleway-bot

api/secret/v1beta1/secret_sdk.go

@@ -422,6 +422,9 @@ type SecretVersion struct {
 	// UpdatedAt: last update of the version.
 	UpdatedAt *time.Time `json:"updated_at"`
 
+	// DeletedAt: date and time of the version's deletion.
+	DeletedAt *time.Time `json:"deleted_at"`
+
 	// Description: description of the version.
 	Description *string `json:"description"`