fix(markdown): trailing newline

Author: danielbaud

dev-docs/bidders/alliance_gravity.md

@@ -26,4 +26,4 @@ privacy_sandbox: no
 {: .table .table-bordered .table-striped }
 | Name          | Scope    | Description       | Example   | Type     |
 |---------------|----------|-------------------|-----------|----------|
-| `srid`        | required | Stored Request ID | `'1234'` | `string` |
+| `srid`        | required | Stored Request ID | `'1234'` | `string` |