Zeta Ssp Bid Adapter: Update adapter docs (#2989)
Zeta Ssp Bid Adapter: Update adapter docs (#2989)

* docs update for eids object

* fixes by review

* other docs changes

* minor fix: all userIds

Co-authored-by: Surovenko Alexey <d4f3add040cc524f2e43ed089f5f067da7f5a368@gmail.com>
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io