Adkernel: documenting RxNetwork alias (#5635)

* Create rxnetwork.md

* Update rxnetwork.md

* Update rxnetwork.md

dev-docs/bidders/rxnetwork.md

@@ -0,0 +1,36 @@
+---
+layout: bidder
+title: RxNetwork
+description: Prebid RxNetwork Bidder Adaptor
+pbjs: true
+pbs: false
+biddercode: rxnetwork
+aliasCode: adkernel
+media_types: banner, native, video
+tcfeu_supported: true
+usp_supported: true
+coppa_supported: true
+gpp_supported: true
+pbs_app_supported: false
+gvl_id: 14 (adkernel)
+schain_supported: true
+userIds: all
+fpd_supported: true
+prebid_member: false
+ortb_blocking_supported: true
+multiformat_supported: will-bid-on-one
+floors_supported: true
+sidebarType: 1
+---
+
+### Note
+
+The RxNetwork Bidding adaptor requires setup and approval before beginning. Please reach out to <[email protected]> for more details
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name     | Scope    | Description           | Example                   | Type     |
+|----------|----------|-----------------------|---------------------------|----------|
+| `host`   | required | Ad network's RTB host | `'cpm.rxnetwork.net'` | `string` |
+| `zoneId` | required | RTB zone id           | `30164`                 | `integer` |