Update chart's readme

chart/elastalert2/README.md

@@ -88,6 +88,7 @@ The command removes all the Kubernetes components associated with the chart and
 | `podSecurityPolicy.create`                   | [DEPRECATED] Create pod security policy resources                                                                             | `false`                                                  |
 | `resources`                                  | Container resource requests and limits                                                                                        | {}                                                       |
 | `rootRulesFolder`                            | Folder where rules will be read from during deployment time. By default, 'rules' must be in root of the chart. **Note:** this will override the rules and secretRulesName values. | `rules` |
+| `enabledRules`                            | Name of the active rules without file extension | `[]` |
 | `rulesVolumeName`                            | Specifies the rules volume to be mounted. Can be changed for mounting a custom rules folder via the extraVolumes parameter, instead of using the default rules configMap or secret rule mounting method. | "rules" |
 | `rules`                                      | Rule and alert configuration for ElastAlert 2                                                                                 | {} example shown in values.yaml                          |
 | `runIntervalMins`                            | Default interval between alert checks, in minutes                                                                             | 1                                                        |