ETARGET ortb2 docs update (prebid#3494)

* ETARGET ortb2 docs update

* ETARGET ortb2 docs update

* ETARGET Taxonomy update

Author: etargetse

dev-docs/bidders/etarget.md

@@ -30,7 +30,7 @@ In release 5.0 and later, publishers should use the `ortb2` method of setting Fi
 - ortb2.user.ext.data.*
 - ortb2.user.data[]
 
-With regards to Contextual and Audience segments, the Magnite exchange supports the IAB standard taxonomies. See [the segment management user guide](https://resources.rubiconproject.com/resource/publisher-resources/segment-management-user-guide/) for more information.
+The ETARGET exchange supports the IAB standard Audience Taxonomy v1.1 and Content Taxonomy v2.2.
 
 Example first party data that's available to all bidders and all adunits:
 ```