docs: update docs to match new helm values

docs/guides-metrics.md

@@ -1,5 +1,13 @@
 # Metrics
 
-The External Secrets Operator exposes its Prometheus metrics in the `/metrics` path. To enable it, set the `prometheus.enabled` Helm flag to `true`.
+The External Secrets Operator exposes its Prometheus metrics in the `/metrics` path. To enable it, set the `serviceMonitor.enabled` Helm flag to `true`. In addition you can also set `webhook.serviceMonitor.enabled=true` and `certController.serviceMonitor.enabled=true` to create `ServiceMonitor` resources for the other components.
 
 The Operator has the metrics inherited from Kubebuilder plus some custom metrics with the `externalsecret` prefix.
+
+## External Secret Metrics
+
+| Name                            | Type    | Description                                        |
+| ------------------------------- | ------- | -------------------------------------------------- |
+| externalsecret_sync_calls_total | Counter | Total number of the External Secret sync calls     |
+| externalsecret_sync_calls_error | Counter | Total number of the External Secret sync errors    |
+| externalsecret_status_condition | Gauge   | The status condition of a specific External Secret |