[why2025-orga] team naming update

[Boekenwuurm]

Hi all,

Quick update: Some teams have requested and/or got a naming update to
match their scope. 
The teams: Fire, Security and First-AID were already reachable under
safety at why2025.org, and that now reflects in their team names.
Team:Music wants to bring wider forms of entertainment, so they
upgraded to team:Entertainment.

So, now you know!

kind regards,
Boekenwuurm