corrected the disable metrics option on windows to be in line with wh…

…at the code says

README.md

@@ -188,7 +188,7 @@ additional details on each available environment variable.
 | `ECS_CHECKPOINT`   | <true | false> | Whether to checkpoint state to the DATADIR specified below. | true if `ECS_DATADIR` is explicitly set to a non-empty value; false otherwise | true if `ECS_DATADIR` is explicitly set to a non-empty value; false otherwise |
 | `ECS_DATADIR`      |   /data/                  | The container path where state is checkpointed for use across agent restarts. Note that on Linux, when you specify this, you will need to make sure that the Agent container has a bind mount of `$ECS_HOST_DATA_DIR/data:$ECS_DATADIR` with the corresponding values of `ECS_HOST_DATA_DIR` and `ECS_DATADIR`. | /data/ | `C:\ProgramData\Amazon\ECS\data`
 | `ECS_UPDATES_ENABLED` | <true | false> | Whether to exit for an updater to apply updates when requested. | false | false |
-| `ECS_DISABLE_METRICS`     | <true | false>  | Whether to disable metrics gathering for tasks. | false | true |
+| `ECS_DISABLE_METRICS`     | <true | false>  | Whether to disable metrics gathering for tasks. | false | false |
 | `ECS_POLL_METRICS`     | <true | false>  | Whether to poll or stream when gathering metrics for tasks. Setting this value to `true` can help reduce the CPU usage of dockerd and containerd on the ECS container instance. See also ECS_POLL_METRICS_WAIT_DURATION for setting the poll interval. | `false` | `false` |
 | `ECS_POLLING_METRICS_WAIT_DURATION` | 10s | Time to wait between polling for metrics for a task. Not used when ECS_POLL_METRICS is false. Maximum value is 20s and minimum value is 5s. If user sets above maximum it will be set to max, and if below minimum it will be set to min. | 10s | 10s |
 | `ECS_PULL_DEPENDENT_CONTAINERS_UPFRONT` | <true | false> | Whether to pull images for containers with dependencies before the dependsOn condition has been satisfied. | false | false |