You can easily change the name and slug of an organization. Both are editable.
To edit an organization's name and/or slug, follow these steps.
If you are in another organization, select Show Overview from the Switch Organization dropdown menu.
Click the Gear icon next to an organization name.
In the home page for the organization click Settings.
Update the Name.
Set the slider to On to make the slug editable and make any changes as required. Be aware of the consequences of changing the slug. See the Warning above.