update readme

Author: egegunes

Diff for: charts/pg-db/README.md

@@ -233,6 +233,7 @@ The chart can be customized using the following configurable parameters:
 | `patroni.dynamicConfiguration.postgresql.pg_hba`     | PostgreSQL Host-Based Authentication section                                                                                                                                                                        | `{}` |
 | `patroni.switchover.enabled`                         | Enables or disables manual change of the cluster primary instance                                                                                                                                                   | `""` |
 | `patroni.switchover.targetInstance`                  | The name of the Pod that should be set as the new primary. When not specified, the new primary will be selected randomly                                                                                            | `""` |
+| `patroni.createReplicaMethods`                  | List of create replica methods in desired order. Operator will update Patroni instance configurations according to its value. If empty operator will add `basebackup` and prepend `pgbackrest` after the initial backup is completed. Valid values: `basebackup`, `pgbackrest`                                                                                            | `[]` |
 | |
 | `extensions.image`               | Image for the custom PostgreSQL extension loader sidecar container                                                          | `""`     |
 | `extensions.imagePullPolicy`     | Policy for the custom extension sidecar container                                                                           | `Always` |