This article explains how to rename an existing group in your workspace.

1. From the web or desktop app, click on the three-dot menu next to your workspace name.
2. Choose Groups from the menu.
3. Click on the three-dot menu next to the group you want to rename. 
4. Click on Rename group from the menu.
5. Type in a new name for your group.
6. When you're done, click on Rename.