DOCS-1177: Add default for nav svc store (#1932)

docs/services/navigation/_index.md

@@ -114,7 +114,7 @@ The following attributes are available for `Navigation` services:
 <!-- prettier-ignore -->
 | Name | Type | Inclusion | Description |
 | ---- | ---- | --------- | ----------- |
-| `store` | obj | **Required** | The type and configuration of data storage to use. Either type `"memory"`, where no additional configuration is needed and the waypoints are stored in local memory while the Navigation process is running, or `"mongodb"`, where data persists at the specified [MongoDB URI](https://www.mongodb.com/docs/manual/reference/connection-string) of your MongoDB deployment. |
+| `store` | obj | **Required** | The type and configuration of data storage to use. Either type `"memory"`, where no additional configuration is needed and the waypoints are stored in local memory while the Navigation process is running, or `"mongodb"`, where data persists at the specified [MongoDB URI](https://www.mongodb.com/docs/manual/reference/connection-string) of your MongoDB deployment. <br> Default: `"memory"` |
 | `base` | string | **Required** | The `name` you have configured for the [base](/components/base/) you are operating with this service. |
 | `movement_sensor` | string | **Required** | The `name` of the [movement sensor](/components/movement-sensor/) you have configured for the base you are operating with this service. |
 | `motion_service` | string | Optional | The `name` of the [motion service](/services/motion/) you have configured for the base you are operating with this service. If you have not added a motion service to your robot, the default motion service will be used. Reference this default service in your code with the name `"builtin"`. |