docs: Add postgreSqlInitContainer values to README

Fixes #645

Signed-off-by: Andreas Lindhé <7773090+lindhe@users.noreply.github.com>

charts/nextcloud/README.md

@@ -155,6 +155,7 @@ The following table lists the configurable parameters of the nextcloud chart and
 | `nextcloud.extraVolumeMounts`                               | specify additional volume mounts for the NextCloud pod                                              | `{}`                       |
 | `nextcloud.securityContext`                                 | Optional security context for the NextCloud container                                               | `nil`                      |
 | `nextcloud.podSecurityContext`                              | Optional security context for the NextCloud pod (applies to all containers in the pod)              | `nil`                      |
+| `nextcloud.postgreSqlInitContainer.securityContext`         | Set postgresql initContainer securityContext parameters.                                            | `{}`                       |
 | `nginx.enabled`                                             | Enable nginx (requires you use php-fpm image)                                                       | `false`                    |
 | `nginx.image.repository`                                    | nginx Image name, e.g. use `nginxinc/nginx-unprivileged` for rootless container                     | `nginx`                    |
 | `nginx.image.tag`                                           | nginx Image tag                                                                                     | `alpine`                   |