feat: Add optional service monitor to HA chart (#1408)

* docs: Document optional service monitor

* docs: Clean monitoring chapter

* Update pages/getting-started/install-memgraph/kubernetes.mdx

---------

Co-authored-by: Matea Pesic <80577904+matea16@users.noreply.github.com>

Author: as51340

pages/getting-started/install-memgraph/kubernetes.mdx

@@ -769,6 +769,7 @@ The following table lists the configurable parameters of the Memgraph HA chart a
 | `prometheus.memgraphExporter.pullFrequencySeconds`         | How often will Memgraph's Prometheus exporter pull data from Memgraph instances.                             | `5`                            |
 | `prometheus.memgraphExporter.repository`                   | The repository where Memgraph's Prometheus exporter image is available.                                      | `memgraph/prometheus-exporter` |                      
 | `prometheus.memgraphExporter.tag`                          | The tag of Memgraph's Prometheus exporter image.                                                             | `0.2.1`                        |                      
+| `prometheus.serviceMonitor.enabled`                        | If enabled, a `ServiceMonitor` object will be deployed.                                             | `true`                         |
 | `prometheus.serviceMonitor.kubePrometheusStackReleaseName` | The release name under which `kube-prometheus-stack` chart is installed.                                     | `kube-prometheus-stack`        |
 | `prometheus.serviceMonitor.interval`                       | How often will Prometheus pull data from Memgraph's Prometheus exporter.                                     | `15s`                          |
 | `labels.coordinators.podLabels`                            | Enables you to set labels on a pod level.                                                                    | `{}`                           |
@@ -868,4 +869,4 @@ Refer to the [Memgraph Lab documentation](/memgraph-lab/configuration) for detai
 
 
 
-
+kube