update docs

Author: anencore94

docs/developer-guide.md

@@ -61,7 +61,8 @@ Below is a list of command-line flags accepted by Katib controller:
 |---------------------------------|---------------------------|-------------------------------|------------------------------------------------------------------------------------------------------------------------|
 | enable-grpc-probe-in-suggestion | bool                      | true                          | Enable grpc probe in suggestions                                                                                       |
 | experiment-suggestion-name      | string                    | "default"                     | The implementation of suggestion interface in experiment controller                                                    |
-| metrics-addr                    | string                    | ":8080"                       | The address the metric endpoint binds to                                                                               |
+| metrics-addr                    | string                    | ":8080"                       | The address that the metrics endpoint binds to                                                                         |
+| healthz-addr                    | string                    | ":18080"                      | The address that the healthz endpoint binds to                                                                         |
 | trial-resources                 | []schema.GroupVersionKind | null                          | The list of resources that can be used as trial template, in the form: Kind.version.group (e.g. TFJob.v1.kubeflow.org) |
 | webhook-inject-securitycontext  | bool                      | false                         | Inject the securityContext of container[0] in the sidecar                                                              |
 | webhook-port                    | int                       | 8443                          | The port number to be used for admission webhook server                                                                |