Update Adapter: Optidigital (prebid#5976)

* update optidigital documentation

* update optidigital documentation

* add gpp support

* add gpp_sids

* enable `pbs`

* Update optidigital.md

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Co-authored-by: Dawid W <dawid@optidigital.fr>
Co-authored-by: Victor Gonzalez <victor@optidigital.com>
Co-authored-by: Chris Huie <phoenixtechnerd@gmail.com>

Author: 4 people

dev-docs/bidders/optidigital.md

@@ -3,7 +3,9 @@ layout: bidder
 title: Optidigital
 description: Prebid Optidigital Bidder Adapter
 biddercode: optidigital
+prebid_member: true
 pbjs: true
+pbs: true
 floors_supported: true
 tcfeu_supported: true
 tcf2_supported: true