Add BEUC to signatories

Author: marcprux

public/img/logos/beuc.eu.png

@@ -51,6 +51,14 @@
   url: "auroraoss.com"
   poc: "Vishal Bakhai <vishal@auroraoss.com>"
   region: "IN"
+- organization: "The European Consumer Organisation (BEUC)"
+  url: "beuc.eu"
+  poc: "Sébastien Pant <sebastien.pant@beuc.eu>"
+  region: "EU"
+  social-mastodon: "https://mastodon.social/@beuc@eupolicy.social"
+  social-bluesky: "https://bsky.app/profile/beuc.eu"
+  social-x: "https://x.com/beuc"
+  social-linkedin: "https://www.linkedin.com/company/beuc-the-european-consumer-organisation/"
 - organization: "Brave"
   url: "brave.com"
   poc: "Shivan Sahib <shivan@brave.com>"