Update java-champions.yml

Update my social links

Author: benfante

java-champions.yml

@@ -273,6 +273,9 @@ members:
     social:
       twitter: https://twitter.com/luciobenfante
       linkedin: https://www.linkedin.com/in/benfante/
+      github: https://github.com/benfante
+      mastodon: https://mastodon.social/@luciobenfante
+      bluesky: https://bsky.app/profile/luciobenfante.bsky.social
     avatar: img/avatars/luciobenfante.png
   - name: Jean-Philippe Bempel
     year: 2021