GitHub: Add TheTradeDesk codepath notifications (#3959)

Author: Net-burst

.github/workflows/scripts/codepath-notification

@@ -21,3 +21,4 @@ appnexus|Appnexus: prebid@microsoft.com
 pubmatic|Pubmatic: header-bidding@pubmatic.com
 openx|OpenX: prebid@openx.com
 medianet|Medianet: prebid@media.net
+thetradedesk|TheTradeDesk: Prebid-Maintainers@thetradedesk.com