External status check api updates

doc/api/status_checks.md

@@ -31,7 +31,7 @@ GET /projects/:id/merge_requests/:merge_request_iid/status_checks
         "id": 2,
         "name": "Rule 1",
         "external_url": "https://gitlab.com/test-endpoint",
-        "status": "approved"
+        "status": "pass"
     },
     {
         "id": 1,
@@ -60,6 +60,7 @@ POST /projects/:id/merge_requests/:merge_request_iid/status_check_responses
 | `merge_request_iid`        | integer | yes      | IID of a merge request                |
 | `sha`                      | string  | yes      | SHA at `HEAD` of the source branch    |
 | `external_status_check_id` | integer | yes      | ID of an external status check        |
+| `status`                   | string  | no       | Set to `pass` to pass the check       |
 
 NOTE:
 `sha` must be the SHA at the `HEAD` of the merge request's source branch.