[WPM] add Wirtualna Polska Media to to tester list (#976)

fledge-tester-list.md

@@ -71,6 +71,7 @@ The usefulness of this page depends on testers sharing information and updates.
 | Globo | DSP & SSP | Testing | | [email protected] |
 | Mediavine | DSP & SSP | 2023-2024 | | [email protected] |
 | Jivox | Ad Server (DCO) | Testing in progress | | [email protected] |
+| Wirtualna Polska Media | Publisher & SSP | Running Protected Audience API tests since July 2023 | https://github.com/grupawp/PAapi | [email protected] |
 
 ## Table - Publishers and Advertisers Interested in Testing or Early Adoption
 Companies who may be interested in participating in tests and early adoption opportunities provided by ad tech companies.