feat(readme): add leader-election-lease-duration flag

Signed-off-by: gjbravi <[email protected]>

Author: gjbravi

docs/deploy/configurations.md

@@ -97,6 +97,7 @@ Currently, you can set only 1 namespace to watch in this flag. See [this Kuberne
 | kubeconfig                                                                      | string                          | in-cluster config                          | Path to the kubeconfig file containing authorization and API server information                                                                |
 | leader-election-id                                                              | string                          | aws-load-balancer-controller-leader        | Name of the leader election ID to use for this controller                                                                                      |
 | leader-election-namespace                                                       | string                          |                                            | Name of the leader election ID to use for this controller                                                                                      |
+| leader-election-lease-duration                                                  | duration                        | 15s                                        | The duration that non-leader candidates will wait to force acquire leadership.                                                                 |
 | load-balancer-class                                                             | string                          | service.k8s.aws/nlb                        | Name of the load balancer class specified in service `spec.loadBalancerClass` reconciled by this controller                                    |
 | log-level                                                                       | string                          | info                                       | Set the controller log level - info, debug                                                                                                     |
 | metrics-bind-addr                                                               | string                          | :8080                                      | The address the metric endpoint binds to                                                                                                       |