Update doc for Yieldone Analytics Adapter (#1513)

* Update doc for Yieldone Analytics Adapter

* Update download.md to add Platform One Analytics

Author: hbanalytics

download.md

@@ -410,6 +410,14 @@ Note: If you receive an error during download you most likely selected a configu
   </div>
 </div>
 
+<div class="col-md-4">
+  <div class="checkbox">
+    <label>
+      <input type="checkbox" analyticscode="yieldone" class="analytics-check-box"> Platform One Analytics
+    </label>
+  </div>
+</div>
+
 <div class="col-md-4">
   <div class="checkbox">
     <label>

overview/analytics.md

@@ -38,6 +38,7 @@ There are several analytics adapter plugins available to track header bidding pe
 | Sovrn | <a href="https://www.sovrn.com/contact/">Contact vendor</a> | [Website](https://www.sovrn.com/analytics/)|
 | STAQ | <a href="https://www.staq.com/contact">Contact vendor</a> | [Website](https://www.staq.com/)|
 | Vuble                                                            | Contact vendor | [Website](https://vuble.tv/us/prebid/) |
+| Yieldone                                                         | Contact vendor | [Website](https://www.platform-one.co.jp/) |
 | YuktaMedia Analytics                                             | Contact vendor | [Website](https://yuktamedia.com/publishers/prebid/) | 
 
 None of these analytics options are endorsed or supported by Prebid.org.