Update documentation for doceree adapter (prebid#3452)

* Update doceree.md

* Update doceree.md

Author: shubhendu-singh-doceree

dev-docs/bidders/doceree.md

@@ -14,3 +14,5 @@ media_types: banner
 |-------------------|----------|----------------|---------------------------|----------|
 | `placementId` 	| required | Placement Id   | `'DOC_7jm9j5eqkl0xvc5w'`  | `string` |
 | `publisherUrl` 	| optional | Current url    | `https://doceree.com`     | `string` |  
+| `gdpr` 	        | optional | Flag to check if gdpr applies   | `1`      | `string` | 
+| `gdprConsent` 	| optional | URL-safe base64-encoded Transparency & Consent string   | `CPQfU1jPQfU1jG0AAAENAwCAAAAAAAAAAAAAAAAAAAAA.IGLtV_T9fb2vj-_Z99_tkeYwf95y3p-wzhheMs-8NyZeH_B4Wv2MyvBX4JiQKGRgksjLBAQdtHGlcTQgBwIlViTLMYk2MjzNKJrJEilsbO2dYGD9Pn8HT3ZCY70-vv__7v3ff_3g`      | `string` |