docs: Add users of springwolf

Author: timonback

README.md

@@ -109,7 +109,10 @@ More details in the documentation.
 - [Alten Italia](https://www.alten.it/)
 - [b.well Connected Health](https://www.icanbwell.com/)
 - [DGARNE - Public Service of Wallonia (BE)](https://agriculture.wallonie.be/accueil)
+- [Eclipse xpanse](https://eclipse.dev/xpanse/)
+- [ITA-Social-Projects](https://github.com/ita-social-projects/GreenCityUBS)
 - [LVM Versicherung](https://www.lvm.de/privatkunden/)
+- [PagoPA](https://www.pagopa.it/en/homepage/)
 - [OTTO](https://www.otto.de)
 - [OTTO Payments](https://www.ottogroup.com/en/careers/kgen/ottopayments.php)
 - [Teambank](https://www.teambank.de)