Update JuliaCon2023.md

Co-Authored-By: Claudio Moroni <43729990+ClaudMor@users.noreply.github.com>
Co-Authored-By: Pietro Monticone <38562595+pitmonticone@users.noreply.github.com>

Author: 3 people

paper/JuliaCon2023.md

@@ -67,5 +67,4 @@ Social preview or logo.
 
 ## Additional Speaker 
 
-Claudio's email address (the same used for GitHub?). 
-
+Claudio's email address (the same used for GitHub?).