Change GDPR URL (#18202)

The GDPR URL points to https://www.eugdpr.org/ which reports to be under construction.

I propose using this: https://ec.europa.eu/info/law/law-topic/data-protection/reform/what-does-general-data-protection-regulation-gdpr-govern_en

P.S.: I'm not a lawyer.

Author: paulomorgado

aspnetcore/security/gdpr.md

@@ -12,7 +12,7 @@ uid: security/gdpr
 
 By [Rick Anderson](https://twitter.com/RickAndMSFT)
 
-ASP.NET Core provides APIs and templates to help meet some of the [EU General Data Protection Regulation (GDPR)](https://www.eugdpr.org/) requirements:
+ASP.NET Core provides APIs and templates to help meet some of the [EU General Data Protection Regulation (GDPR)](https://ec.europa.eu/info/law/law-topic/data-protection/reform/what-does-general-data-protection-regulation-gdpr-govern_en) requirements:
 
 ::: moniker range=">= aspnetcore-3.0"