Update exco bidder documentation (prebid#6002)

* feat(): EXCO Bid Adapter: Support of new publisherId, accountId and tagId parameters.

* feat(): EXCO Bid Adapter: Support of new publisherId, accountId and tagId parameters.

* feat(): EXCO Bid Adapter: Support of new publisherId, accountId and tagId parameters.

* Update exco bidder documentation

Author: pb-pete

dev-docs/bidders/exco.md

@@ -1,7 +1,7 @@
 ---
 layout: bidder
-title: Exco
-description: Prebid Exco Bidder Adaptor
+title: EX.CO
+description: Prebid EX.CO Bidder Adaptor
 biddercode: exco
 filename: excoBidAdapter
 userIds: britepoolId, criteo, id5Id, identityLink, liveIntentId, netId, parrableId, pubCommonId, unifiedId