doc: fix default value of initContainers.waitForRedis.image.repository in README (#358)

Author: vprivat-ads

helm/oauth2-proxy/README.md

@@ -172,7 +172,7 @@ The following table lists the configurable parameters of the oauth2-proxy chart
 | `ingress.tls`                                         | Ingress TLS configuration                                                                                                                                                                                                                                        | `nil`                                                                                                |
 | `initContainers.waitForRedis.enabled`                 | If `redis.enabled` is true, use an init container to wait for the Redis master pod to be ready. If `serviceAccount.enabled` is true, create additionally a role/binding to get, list, and watch the Redis master pod                                             | `true`                                                                                               |
 | `initContainers.waitForRedis.image.pullPolicy`        | kubectl image pull policy                                                                                                                                                                                                                                        | `IfNotPresent`                                                                                       |
-| `initContainers.waitForRedis.image.repository`        | kubectl image repository                                                                                                                                                                                                                                         | `docker.io/bitnami/kubectl`                                                                          |
+| `initContainers.waitForRedis.image.repository`        | kubectl image repository                                                                                                                                                                                                                                         | `alpine`                                                                          |
 | `initContainers.waitForRedis.kubectlVersion`          | kubectl version to use for the init container                                                                                                                                                                                                                    | `printf "%s.%s" .Capabilities.KubeVersion.Major (.Capabilities.KubeVersion.Minor \| replace "+" "")` |
 | `initContainers.waitForRedis.securityContext.enabled` | enable Kubernetes security context on container                                                                                                                                                                                                                  | `true`                                                                                               |
 | `initContainers.waitForRedis.timeout`                 | number of seconds                                                                                                                                                                                                                                                | 180                                                                                                  |