ci fix for namespace packages

[cchris28]

Change Description

namespace packages seem to require an actual commit to correctly installj.
Without the commit the namespace package does not include the subpackage
resulting in import failures. If your project is "acme-widget" namespace is "acme" and your subpackage is
"widget" then
import acme.widget
will fail because site-packages will have "acme-widget" and "acme" but "acme" will not have "acme/widget".

Having an actual commit fixes this. I do not understand why it matters.

Checklist

• [] This PR is meant for the lincc-frameworks/python-project-template repo and not a downstream one instead.
• [] This change is linked to an open issue
• This change includes integration testing, or is small enough to be covered by existing tests

[drewoldag]

Looks good. Thanks for all the effort here!