Navigate to the Workflow settings from the Workflow editor.
How to navigate through the Workflow editor
Edit the 'Workflow name'.
Edit the Workflow name field under Submission settings.

Click Publish to apply changes.

Change the name of a webform as it will appear in your Workflow dashboard. The Workflow name will also appear to your end user in their web browser and email notifications. This can be different from how you name submissions and the name of your individual webforms and PDFs.
How to navigate through the Workflow editor
Edit the Workflow name field under Submission settings.

Publish to apply changes.