add origing_state field to export docs

docs/data-export.md

@@ -53,6 +53,7 @@ The data export includes the following data fields:
 | **dnt** | `boolean` | If the user includes a DNT request in their header, that is logged here and [they will not be tracked](/gateway/#do-not-track). |
 | **confidence** | `numeric` | The probability of correct identification of the data. |
 | **endpoint_id** | `text` | This uniquely identifies the public-facing device that has interacted with a Scarf event. Unlike origin_id, it is notably not sensitive to changes in device information like client, user agent, etc. |
+| **origin_state** | `text` | This is the state of the location Scarf is able to identify for the event. |
 
 ## Integrations