update bidders doc for smarthub (#3569)

* adding SmartHub bidder docs

* removed pbjs version note

* using partner Name instead of host due to the changing way building endpoint URL in adapter
discussion in the prebid-server repo: prebid/prebid-server#1932 (comment)

* docs displaying fix

* add Prebid.js Bid Params in SmartHub documentation

* fix align

Co-authored-by: bretg <bgorsline@gmail.com>
Co-authored-by: Chris Huie <phoenixtechnerd@gmail.com>

dev-docs/bidders/smarthub.md

@@ -12,6 +12,18 @@ pbs: true
 pbs_app_supported: true
 ---
 
+### Prebid.js Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description                     | Example                             | Type      |
+|---------------|----------|---------------------------------|-------------------------------------|-----------|
+| `partnerName` | required | Unique partner name             | `'partnertest'`                     | `string`  |
+| `seat`        | required | Seat value                      | `'9Q20EdGxzgWdfPYShScl'`            | `string`  |
+| `token`       | required | Token                           | `'eKmw6alpP3zWQhRCe3flOpz0wpuwRFjW'` | `string`  |
+| `iabCat`      | optional | Array of IAB content categories that describe the content producer | `['IAB1-1', 'IAB3-1', 'IAB4-3']`    | `Array(String)`   |
+| `minBidfloor`  | optional | Minimal CPM value               | `0.03`                              | `float`    |
+| `pos`         | optional | The position of the placement on the page, see Open RTB spec v2.5.    | `4`                                 | `number`  |
+
 ### Prebid Server Bid Params
 
 {: .table .table-bordered .table-striped }