Welect Adapter: update docs with new params (#6058)

Author: jkneiphof

dev-docs/bidders/welect.md

@@ -24,15 +24,16 @@ sidebarType: 1
 ---
 
 ### Note
+
 The Welect bidder adapter requires setup and approval from the Welect team. Please reach out to [[email protected]](mailto:[email protected]) for more information.
 
 ### Bid params
 
 {: .table .table-bordered .table-striped }
+
 | Name | Description | Example | Type |
 |---|---|---|---|
 | `placementId` | an identifier for your placement, provided by Welect | `'exampleID'` | `string` |
-| `domain` | The domain of your placement | `'www.example.com'` | `string` |
 
 ### Example Ad Unit Setup
 
@@ -41,13 +42,12 @@ var adUnits = [
   {
     bidder: 'welect',
     params: {
-      placementId: 'exampleId',
-      domain: 'www.welect.de'
+      placementId: 'exampleId'
     },
-    sizes: [[640, 360]],
     mediaTypes: {
       video: {
-        context: 'instream'
+        context: 'instream',
+        playerSize: [640, 360]
       }
     },
   };