Is your feature request related to a problem? Please describe.

When creating a new release to test#2717, I thought the PR was bad because it was possible to create a release named just3.20, causing thedownloads/windows/ page to crash because it lacked aNone check in the PR for release version.

Describe the solution you'd like

It'd be nice to just give a little error message in the admin form submission via:

defclean(self):super().clean()ifnotre.match(r'^Python\s[\d.]+$',self.name):raiseValidationError({'name':'Name must be in the format "Python X.Y.Z" (e.g., "Python 3.9.0")'      })

to get:

Basic Example

No response

Describe alternatives you've considered

No response

Drawbacks and Impact

No response

Additional context

No response