[Criteo] Deprecation of the nativeCallback parameter (prebid#5586)

Author: julietterochon

dev-docs/bidders/criteo.md

@@ -38,7 +38,7 @@ Prebid-Server support is on alpha test and is currently a non-finished product.
 | `networkId`       | required | The network ID from Criteo. Please reach out your Criteo representative for more details.                             | `456456`                                      | `integer`  |
 | `pubid`           | required | publisher id | `'ABC123'` |  `string` |
 | `uid`             | optional | Ad Unit ID   | `'8888'` |  `string` |
-| `nativeCallback`  | optional | (Prebid.js only) Callback to perform render in native integrations. Please reach out your Criteo representative for more details.     | `function(payload) { console.log(payload); }` | `function` |
+| `nativeCallback`  | optional | (deprecated) (Prebid.js only) Callback to perform render in native integrations. Please reach out your Criteo representative for more details.     | `function(payload) { console.log(payload); }` | `function` |
 | `integrationMode` | optional | (Prebid.js only) Integration mode to use for ad render (none or 'AMP'). Please reach out your Criteo representative for more details. | `'AMP'`                                       | `string`   |
 | `publisherSubId`  | optional | Custom identifier for reporting. Please reach out your Criteo representative for more details. | `'adunit-1'` |  `string` |