fix(specs): nb_api_calls in getLogs response is optional (#4142)

Author: shortcuts

specs/search/paths/advanced/getLogs.yml

@@ -152,7 +152,6 @@ get:
                     - ip
                     - query_headers
                     - sha1
-                    - nb_api_calls
                     - processing_time_ms
     '400':
       $ref: '../../../common/responses/BadRequest.yml'