Everyone in a channel can change the channel name, not only the creator.
Edit privacy settings on Channels to limit who has access.
Related Resources:
Why can users share weets in a private Channel that they are not a part of?
Why do I have to reset my password, even though I know my credentials are correct?
What happens when my team or I hit the 10 video limit on the Free plan?
How do I create custom virtual backgrounds for my camera?
What is the difference between a work and personal Workspace?
What is a Workspace and how do I create one?